AccessViolationException

I am using System.Data.OracleClient provider and I am getting this error message. can someone help me with this.If I should load a patch from oracle or somewhere if it is an oracle bug
Exception information:
Exception type: AccessViolationException
Exception message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Request information:
Request URL:
Request path: /plandetail.aspx
User host address: 156.99.41.188
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\NETWORK SERVICE
Thread information:
Thread ID: 76
Thread account name: NT AUTHORITY\NETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.Common.UnsafeNativeMethods.OCIServerAttach(OciHandle srvhp, OciHandle errhp, Byte[] dblink, Int32 dblink_len, MODE mode)
at System.Data.OracleClient.TracedNativeMethods.OCIServerAttach(OciHandle srvhp, OciHandle errhp, String dblink, Int32 dblink_len, MODE mode)
at System.Data.OracleClient.OracleInternalConnection.OpenOnLocalTransaction(String userName, String password, String serverName, Boolean integratedSecurity, Boolean unicode, Boolean omitOracleConnectionName)
at System.Data.OracleClient.OracleInternalConnection..ctor(OracleConnectionString connectionOptions)
at System.Data.OracleClient.OracleConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.OracleClient.OracleConnection.Open()
at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable)
at phldetail.addenda()
at phldetail.Page_Load(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

There is a thread going about this same error a few doors down. But we should keep this one open too because as far as I can tell there are 6 million different reasons why this Protected Memory error can occur.
First thing you'll need to tell us is:
1) Oracle database version and platform
2) Oracle client version and platform
3) IIS version and platform
4) .Net Framework version
5) Visual Studio version
6) Have you installed the Oracle client and ODAC in the same ORACLE_HOME or is different ORACLE_HOMEs?
7) Have you done a recent code review to ensure you're closing and disposing of your connections properly?
8) Are you doing any unorthodox conversions, like a lot of TO_NUMBER or TO_CHAR conversions?
Probably other people can add some more question in order to help find the root cause.
I had the same problem with the 11g client and 10g client, and the error always pointed to OraOps11w.dll or OraOps10x.dll as the culprit, but I have the feeling that something is behind that and causing the %w.dll to have problems. I have an open call with Oracle support on the issue and also with MS Gold support. Between the two we should have an answer by Monday which I will post here and in the other thread on the same subject.
But don't let that stop you from investigating also, because each situation seems to be different from the next and the root cause of your error could be something completely different from what turns out to be the root cause of mine.

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Getting intermittent AccessViolationExceptions when accessing stores from Outlook.Stores object

We have a very strange situation in which we get random AccessViolationExceptions when trying to access stores (in particular our own) via the Outlook.Stores.
Here's a code snippet of how we're calling this (currently done in our Outlook.ExplorerEvents_ActivateEventHandler handler, and only the first time is is called)
Outlook.NameSpace ns = ThisAddIn.OutlookApplication.GetNamespace("MAPI");
Outlook.Stores stores = ns.Stores;
Outlook.Store store = null;
int nStoreCount = stores.Count;
for (int i = 1; i < nStoreCount; i++)
store = stores[i];
String name = store.DisplayName;
store = null;
When we get to the point of accessing a store via index, we will sometimes get the AccessViolationException, but only sometimes and only (as far as I can tell, since the order isn't always the same from run to run) our message store.
We originally had this bit of code in our ThisAddin_Startup sequence, but it would actually crash Outlook completely when the exception occurred, so I moved it out of there and it at least now doesn't bring down the whole application.
MFCMAPI has no trouble opening the message store ever.
I have seen some references in my research to problems with .net 4.0 and earlier with regards to SynchronizationContext being null, and we are using 4.0 and getting null SynchronizationContext.current values. But we get that when the exception doesn't happen,
too, so I don't know if that's a red herring. However, this code is a back-port from a newer version of our software that was coded against .Net 4.5, and we don't see the issue there at all. As this is going into a patch, build with VS2010, we can't change
the target platform.
I have tried moving the call to worker threads, and I even saw one suggestion of trying to do it in our Outlook.ExplorerEvents_SelectionChangeEventHandler code, but nothing seems to work.
I should note that after the exception occurs, and the Outlook Explorer window opens and populates, if the user manually clicks our message store node, the MSProviderInit->IMSProvider::Logon sequence fires, and fires without the MDB_NO_DIALOG flag being
sent in. During Outlook's start-up, we get that sequence of calls several times, but always with the MDB_NO_DIALOG set, so we return MAPI_E_LOGON_FAILED and don't execute the code which creates our IMsgStore object. So the user's manual operation causes our
IMsgStore to get created and everything is fine. The reason the above code is added is to try to simulate the user's manual action and sort of 'tickle' the store creation process.
When the AccessViolationException does not occur, we get the full MSProviderInit->IMSProvider::Logon, etc sequence. When it does except, we don't even get our MSProviderInit entry point called. It's almost as if our dll gets loaded and then Outlook loses
it.
Any thoughts on this?

Hi Kevin Delgado,
>>if somebody knows what these other flags mean/are defined as in the context of the IMSProvider::Logon call, that would be great<<
Did you mean that the value of ulFlags? If yes, you can refer to the document below:
ulFlags
[in] A bitmask of flags that controls how the logon is performed. The following flags can be set:
MAPI_DEFERRED_ERRORS
The call is allowed to succeed even if the underlying object is not available to the calling implementation. If the object is not available, a subsequent call to the object might raise an error.
MAPI_UNICODE
The passed-in strings are in Unicode format. If MAPI_UNICODE is not set, the strings are in ANSI format.
MDB_NO_DIALOG
Prevents the display of logon dialog boxes. If this flag is set, the error value MAPI_E_LOGON_FAILED is returned if the logon is unsuccessful. If this flag is not set, the message store provider can prompt the user to correct a name or password, to insert
a disk, or to perform other actions that are necessary to establish connection to the store.
MDB_NO_MAIL
The message store should not be used for sending or receiving mail. The flag signals MAPI not to notify the MAPI spooler that this message store is being opened. If this flag is set and the message store is tightly coupled with a transport provider,
the provider does not need to call the IMAPISupport::SpoolerNotify method.
MDB_TEMPORARY
Logs on the store so that information can be retrieved programmatically from the profile section, without use of dialog boxes. This flag instructs MAPI that the store is not to be added to the message store table and that the store cannot be made permanent.
If this flag is set, message store providers do not need to call the IMAPISupport::ModifyProfile method.
MDB_WRITE
Requests read/write permission.
Also you can get more detail about IMSProvider::Logon function from link below:
https://msdn.microsoft.com/en-us/library/office/cc842201.aspx
Hope it is hlepful.
Regards & Fei
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AccessViolationException: Attempted to read or write protected memory.

Hello all.
The application that I am working on has a Oracle DB 10g and we want to migrate the DB to 11g (11.2.0.2). The client OS is a Windows 7 x64 and the application (which is an x86 app) is a hybrid between .NET and C++(COM components). The .NET part is using ODP.NET components and the C++ part is using ODBC drivers (oraclient 11.2.0.1 - x86 version).
The problem is that the application works without any problems with the 10g DB but when switching to 11g we get an exception. Basically, we have a try { call COM component } catch(Ex ex) {...} and the Exception ex is a AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. I debugged the C++ part and this strange thing happens: the component opens the connection (using a connection string like this : "driver={Oracle in OraClient}; uid=... pwd=.. "), executes some queries, and on one query (which is the same as the last ones - just some selects), when the data is processed (by data I mean a integer ID), the exception is thrown in .NET code. I was able to enter in afxdb.cpp and it looks like the exception is thrown when GetData method is called. I looked over the ID's from previous queries and the data passed to GetData method is about the same (I mean the fieldtype, index, len, SQL type).
As solutions I tried:
-set "Statement Cache Purge=true" => same effect
- install a instantclient11_2 basic and ODBC drivers (for 11.2.0.2) but I could not connect to the DB (I could find the new drivers in registry WoW64Node/ODBC Drivers, put the location in PATH in front of the other OraClient and replace the OraClient with the name in registry in conn string) => Specified driver could not be loaded due to system error 127.
- tried to see the Marshal.GetLastWin32Error() => returns 0.
Any ideas? :D
Edited by: 917334 on Feb 27, 2012 12:57 PM

The select clause that causes the problem is actually a select over a view. I replaced the select * from MYView with the actual select clause (with inner join) and the issue disappeared.
Any ideas? :)
Solution:
Looks like the view was written using INNER JOIN stuff. I replaced the code from the view with a simple select like this (inner join free):
select table1.col1, table2.col2, table3.col2, from table1, table2, table3 where table1.col1 = table2.col1 and table1.col1 = table3.col1
Some questions still remain (even if my issue is partially solved):
- why was it working on 10g?
- why this particular view crashed? (there are other views that use inner join and don't cause this)
- why was it working when using the full select (with inner join) and not working when selecting over the view?
Edited by: 917334 on 28.02.2012 08:33

Context connection and error ORA-20100: System.AccessViolationException

I created a .NET stored procedure by following the instructions on this web (used different proc name):
[http://www.oracle.com/technology/obe/net11gobe/stfunc/vs2.htm]
I can deploy it fine into the database but got the following error when I ran it in SQL*Plus Worksheet:
ORA-20100: System.AccessViolationException
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at Oracle.DataAccess.Client.OpsCon.OpenUsingExtProcContext(IntPtr ociExtProcContext, IntPtr& opsConCtx, IntPtr& opsErrCtx, OpoConValCtx pOpoConValCtx, OpoConRefCtx& pOpoConRefCtx)*
at Oracle.DataAccess.Client.OracleConnection.OpenExtprocConnection()
at Oracle.DataAccess.Client.OracleConnection.Open()
at OracleTestProject.Class1.GetName()
ORA-06512: at "SYS.DBMS_CLR", line 243
ORA-06512: at "COMMPROD10.GETNAME", line 6
I got the following error if I ran it again:
ORA-20100: System.AccessViolationException
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at Oracle.DataAccess.Client.OpsSql.ExecuteReader(IntPtr opsConCtx, IntPtr& opsErrCtx, IntPtr& opsSqlCtx, IntPtr& opsDacCtx, IntPtr& opsReaderErrCtx, IntPtr opsSubscrCtx, Int32& isSubscrRegistered, Int32 bchgNTFNExcludeRowidInfo, Int32 bQueryBasedNTFNRegistration, Int64& query_id, OpoSqlValCtx& pOpoSqlValCtx, String pCommandText, OpoDacValCtx*& pOpoDacValCtx, IntPtr[] pOpoPrmValCtx, String[] ppOpoPrmRefCtx, OpoMetValCtx*& pOpoMetValCtx, Int32 NoOfParams)*
at Oracle.DataAccess.Client.OracleCommand.ExecuteReader(Boolean requery, Boolean fillRequest, CommandBehavior behavior)
at Oracle.DataAccess.Client.OracleCommand.ExecuteReader()
at OracleTestProject.Class1.GetName()
ORA-06512: at "SYS.DBMS_CLR", line 243
ORA-06512: at "COMMPROD10.GETNAME", line 6
The error was gone if I changed the connection string "context connection=true" to regular connection string with specific Data Source;User ID;Password in the .NET stored proc. Does anyone know how to solve it?
FYI, I have installed Oracle Database 10.2.0.1.0 and then upgraded ODE.NET to 10.2.0.2.20 and then installed Oracle Database patch 10.2.0.4 on my machine.
I have also installed the latest ODP.NET 11.1.0.6.20 and Oracle Developer Tools for Visual Studio from the web:
[http://www.oracle.com/technology/software/tech/windows/odpnet/index.html]
The top most line in my GAC showed both Oracle.Database.Extensions and Oracle.DataAccess have Version= 2.102.2.20.
Thank you so much for the help!
Jenny

skj,
Thank you for the reply!
Yes, the Oracle Database patch 10.2.0.4 contains both ODE and ODP. The database I tried to connect to is on my machine so there was no remote server.
Here is the result when I ran: gacutil /l oracle.database.extensions:
Microsoft (R) .NET Global Assembly Cache Utility. Version 2.0.50727.42
Copyright (c) Microsoft Corporation. All rights reserved.
The Global Assembly Cache contains the following assemblies:
oracle.database.extensions, Version=2.102.2.20, Culture=neutral, PublicKeyToke
n=89b483f429c47342, processorArchitecture=x86
oracle.database.extensions, Version=2.102.4.0, Culture=neutral, PublicKeyToken
=89b483f429c47342, processorArchitecture=x86
oracle.database.extensions, Version=1.102.3.0, Culture=neutral, PublicKeyToken
=89b483f429c47342
oracle.database.extensions, Version=1.102.4.0, Culture=neutral, PublicKeyToken
=89b483f429c47342
Here is the result when I ran: gacutil /l oracle.dataAccess:
The Global Assembly Cache contains the following assemblies:
oracle.dataAccess, Version=2.102.2.20, Culture=neutral, PublicKeyToken=89b483f
429c47342, processorArchitecture=x86
oracle.dataAccess, Version=2.102.4.0, Culture=neutral, PublicKeyToken=89b483f4
29c47342, processorArchitecture=x86
oracle.dataAccess, Version=2.111.6.20, Culture=neutral, PublicKeyToken=89b483f
429c47342, processorArchitecture=x86
oracle.dataAccess, Version=1.102.4.0, Culture=neutral, PublicKeyToken=89b483f4
29c47342
oracle.dataAccess, Version=1.111.6.20, Culture=neutral, PublicKeyToken=89b483f
429c47342
I am not sure which version is really used. Maybe I should downgrade my ODP?

Outlook freeze/restart trying to Save() current appointment (AccessViolationException)

I maintain an Outlook VSTO add-in. If the user opens an appointment window, and while it's open the sender updates the appointment, when the user closes the appointment window there's about a one in six chance Outlook will freeze, crash, and restart. It
doesn't happen every time. Debugger shows an AccessViolationException that my add-in is unable to catch.
Upon restart, users get the error, "Outlook experienced a serious problem with the '<Addin Name>' add-in. If you have seen this message multiple times, you should disable this add-in and check to see if an update is available. Do you want
to disable this add-in?"
We've seen this almost entirely on Outlook 2010. This happens with no other add-ins enabled.
Here are the exception details:
System.AccessViolationException was unhandled by user code
HResult=-2147467261
Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Source=Outlook Scheduler
StackTrace:
at Microsoft.Office.Interop.Outlook._AppointmentItem.Save()
at Outlook_Scheduler.App_Code.AppointmentItemWrapper.Close() in c:\...\Outlook Scheduler\App_Code\AppointmentItemWrapper.cs:line 139
at Outlook_Scheduler.App_Code.InspectorWrapper.Inspector_Close() in c:\...\Outlook Scheduler\App_Code\InspectorWrapper.cs:line 63
InnerException:
And here's the Close() event handler that's firing, abbreviated:
internal class AppointmentItemWrapper : InspectorWrapper {
//... other members ...
protected override void Close() {
if (Globals.ThisAddIn.Application.ActiveInspector() != null)
try
var currentAppointment = (Outlook.AppointmentItem)Globals.ThisAddIn.Application.ActiveInspector().CurrentItem;
var lastModificationTime = currentAppointment.LastModificationTime;
var creationTime = currentAppointment.CreationTime;
if (...)
else if (currentAppointment.Saved && // If user clicked "yes" on save prompt, or if item has not been modified since last save or creation.
!(creationTime.Equals(lastModificationTime))) // If item has been modified since creation.
// [[[This is the code path taken]]]
currentAppointment.Save(); // <=== Occasional "AccessViolationException" not caught by catch statement, below. Outlook freezes/restarts. HResult=-2147467261, Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
catch (Exception e)
// Log exception
Note the currentAppointment.Save() line. The debugger shows the exception there, but at runtime it's not caught.
The else-if block was added because we had issues where the user was prompted to save each appointment, even if it was unmodified.
The appointments have some UserProperty on them.
Does anyone know what's wrong here or how to troubleshoot further? I'm new to VSTO and didn't write this, so I'm not sure if the Outlook object model is being handled properly. The InspectorWrapper class appears to be from this
article.

Hello,
The Close event handler is not suitable for saving items. Try to remove or comment the following line of code:
currentAppointment.Save();
The Close method of the Inspector class accepts the OlInspectorClose enumeration which is used
to indicate the save mode. And you are trying to overwrite/change the chosen way in the code.
Also I'd suggest breaking the chain of calls and declaring each property or method on a single line of
code:
Application.ActiveInspector().CurrentItem
For example, the ActiveInspector method returns an instance of the Inspector class. Then the CurrentItem property of the Inspector class returns an instance of the
AppointmentItem class. Both objects are left alive. Instead, I'd recommend releasing them instantly. Use System.Runtime.InteropServices.Marshal.ReleaseComObject to
release an Outlook object when you have finished using it. Then set a variable to Nothing in
Visual Basic (null in C#) to release the
reference to the object. Read more about that in the Systematically Releasing
Objects article.
Finally, always install the latest updates and service packs for Office applications.

System.AccessViolationException following database reconnection

We support a VB.NET application which uses Oracle Data Access Components (ODAC) 10.2.0.2.21 to access an Oracle 11g database. The database is on another server, so from time to time application loses its database connection because of comms failures. To cater for this eventuality the application before every database call checks for a valid connection and reopens the database if it can’t find one. This works, but subsequent database calls fail and return a System.AccessViolationException.
Here is an extract from the trace.
2010-09-08 17:08:42,284 ERROR - Database connection lost. Oracle.DataAccess.Client.OracleException ORA-03135: connection lost contact
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at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, String procedure, IntPtr opsErrCtx, OpoSqlValCtx pOpoSqlValCtx, Object src)
at Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery()
2010-09-08 17:08:42,377 [5] ERROR - Database connection established.
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at Oracle.DataAccess.Client.OpsSql.ExecuteNonQuery(IntPtr opsConCtx, IntPtr& opsErrCtx, IntPtr& opsSqlCtx, IntPtr& opsDacCtx, IntPtr opsSubscrCtx, Int32& isSubscrRegistered, OpoSqlValCtx& pOpoSqlValCtx, String pCommandText, IntPtr& pUTF8CommandText, IntPtr[] pOpoPrmValCtx, String[] ppOpoPrmRefCtx, OpoMetValCtx& pOpoMetValCtx, Int32 prmCnt)
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Has anyone come across this before? Any help will be gratefully received.
When this question was posted in another forum, someone suggested that the solution might be to flush out the connection pool. Could anyone elaborate on that?

The first thing I'd recommend is patching to 10.2.0.5. 10.2.0.2.21 ODP was the first version to have .NET 2 support, and many issues have been taken care of since then. To do that, apply the 10205 rdbms patch (which you get on My Oracle Support) to your client installation.
Are you Disposing of the connection after the 3135 occurs?
As far as flushing the pool, the ClearPool APIs are available in 10.2 and higher, and discussed in the docs:
http://download.oracle.com/docs/cd/E11882_01/win.112/e12249/featConnecting.htm#CJAGDAGG
Hope it helps,
Greg

Exchange 2013 Update Crashes: System.AccessViolationException

Currently we are trying to update Exchange Server 2013 from RTM Release Version 15.0 (Build 516.32) to CU4 (SP1). Each time we try to run the installer Configuring Microsoft Exchange Server. This happens for any of the CU Updates. Exchange is
installed on the Domain Controller, Windows Server 2012.
Organization Preparation 0%
Unhandled Exception: System.AccessViolationException: Attempted to read or write
protected memory. This is often an indication that other memory is corrupt.
at Microsoft.Exchange.Management.Deployment.ExsetdataNativeMethods.SetupAtom(
UInt32 atomID, UInt32 setupMode, String InstallDir, String SourceDir, String DCN
ame, String Org, String LegacyOrg, String AdminGroup, String LegacyAdminGroup, S
tring AdminGroupContainingRoutingGroup, String RoutingGroup, ManagedLoggerDelega
te logger)
at Microsoft.Exchange.Management.Deployment.ManageExsetdataAtom.BuildToBuildU
pgradeAtom(AtomID atomID)
at Microsoft.Exchange.Management.Deployment.BuildToBuildUpgradeExsetdataAtom.
InternalProcessRecord()
at Microsoft.Exchange.Configuration.Tasks.Task.ProcessRecord()
at System.Management.Automation.CommandProcessor.ProcessRecord()
at System.Management.Automation.CommandProcessorBase.DoExecute()
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecute
Enumerate(Object input, Hashtable errorResults, Boolean enumerate)
at System.Management.Automation.PipelineOps.InvokePipeline(Object input, Bool
ean ignoreInput, CommandParameterInternal[][] pipeElements, CommandBaseAst[] pip
eElementAsts, CommandRedirection[][] commandRedirections, FunctionContext funcCo
ntext)
at System.Management.Automation.Interpreter.ActionCallInstruction`6.Run(Inter
pretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.R
un(InterpretedFrame frame)
at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.R
un(InterpretedFrame frame)
at System.Management.Automation.Interpreter.Interpreter.Run(InterpretedFrame
frame)
at System.Management.Automation.Interpreter.LightLambda.RunVoid1[T0](T0 arg0)
at System.Management.Automation.DlrScriptCommandProcessor.RunClause(Action`1
clause, Object dollarUnderbar, Object inputToProcess)
at System.Management.Automation.CommandProcessorBase.DoComplete()
at System.Management.Automation.Internal.PipelineProcessor.DoCompleteCore(Com
mandProcessorBase commandRequestingUpstreamCommandsToStop)
at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecute
Enumerate(Object input, Hashtable errorResults, Boolean enumerate)
at System.Management.Automation.Runspaces.LocalPipeline.InvokeHelper()
at System.Management.Automation.Runspaces.LocalPipeline.InvokeThreadProc()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionCo
ntext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, C
ontextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, C
ontextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

Hello,
For security and performance reasons, it is not recommended that installing Exchange Server on DC server.
Please use dcdiag command-line tool to check if your DC server run normally.
Please check if there is related error in application log, when the issue occurs.
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TechNet Community Support

Orantcp9.dll System.AccessViolationException

Hi
i have some problems with the oracle client. Can anybody help?
I get this error in the Evenlog
Description:
Faulting application x.exe, version 2.6.6.1, faulting module orantcp9.dll, version 9.2.0.6, fault address 0x000056a4.
And this error from the UnhandledException Handler.
### UnhandledException ### System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at System.Threading.WaitHandle.WaitOneNative(SafeWaitHandle waitHandle, UInt32 millisecondsTimeout, Boolean hasThreadAffinity, Boolean exitContext)
at System.Threading.WaitHandle.WaitOne(Int64 timeout, Boolean exitContext)
at System.Threading.WaitHandle.WaitOne(Int32 millisecondsTimeout, Boolean exitContext)
at System.Data.ProviderBase.DbConnectionPool.CleanupCallback(Object state)
at System.Threading._TimerCallback.TimerCallback_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading._TimerCallback.PerformTimerCallback(Object state)
hope you can give me a hint for this problem
thx Mike

Hi
i have some problems with the oracle client. Can anybody help?
I get this error in the Evenlog
Description:
Faulting application x.exe, version 2.6.6.1, faulting module orantcp9.dll, version 9.2.0.6, fault address 0x000056a4.
And this error from the UnhandledException Handler.
### UnhandledException ### System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at System.Threading.WaitHandle.WaitOneNative(SafeWaitHandle waitHandle, UInt32 millisecondsTimeout, Boolean hasThreadAffinity, Boolean exitContext)
at System.Threading.WaitHandle.WaitOne(Int64 timeout, Boolean exitContext)
at System.Threading.WaitHandle.WaitOne(Int32 millisecondsTimeout, Boolean exitContext)
at System.Data.ProviderBase.DbConnectionPool.CleanupCallback(Object state)
at System.Threading._TimerCallback.TimerCallback_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading._TimerCallback.PerformTimerCallback(Object state)
hope you can give me a hint for this problem
thx Mike

System.AccessViolationException .... Using add_on with UDO

Hello
I have a problem with a add_on using UDO. The addon works well and installed everything except objects related to UDO. When I enter a record in UDO gives me the following error ..
System.AccessViolationException'': Attempted to read or write protected memory. ...''
Another machine is installed the same ADD_ON and work perfectly.
The version is 8.81 PL5
Thanks.
Edited by: Carlos Zea Perez on Jun 30, 2011 7:23 PM

First of all I have to once again strongly disagree with anyone who has an immediate response of "Upgrade your version", with no reason to do so. Was it a reported bug in the lower version? Is there a note about it? Upgrading the version, in a realistic Business environment is not an option unless it is a proven bug. It is an expense that customers will not pay.
Secondly, the poster didn't even read the initial post because it clearly says that the same addon works on another machine! How could it have anything to do with the version? It is not a helpful answer.
Thirdly, this is a common error.
Try the following:
1. Go to start->Run->%temp% and delete the SM_OBS_DLL file
2. Go to add remove programs and remove the DI API installation
3. Restart the machine
4. Install the DI API from the PL05 again
5. Retry your addon
If the error still occurs, please let us know & include some code samples of where in the code the error is happening.

AccessViolationException - Connection.Open()

Hey guys, I have a really severe problem not beeing able to persist a suspended Windows Workflow Foundation workflow. (using Oracle.DataAccess 2.111.6.20)
I want to persist such a workflow to the database when it get´s inactive. My problem is in exact that case I am not able to open a OracleConnection to the database. If I open the connection before or after the actual persistence should take place everything works as expected.
The result on con.Open() are just these 2 exceptions:
A first chance exception of type 'System.AccessViolationException' occurred in Oracle.DataAccess.dll
A first chance exception of type 'Oracle.DataAccess.Client.OracleException' occurred in Oracle.DataAccess.dll
The testcode is kind of simple:
private void TestOraConnect()
// Create the connection object
OracleConnection con = new OracleConnection();
con.ConnectionString = "user id=test;password=pass;connection timeout=2147483647;data source=(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=myhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=myservice)))";
con.Open();
con.Close();
Thank you for any help, suggestions to overcome this problem.

ODP.NET consists of managed and unmanaged code. Every time a new ODP.NET version is installed, it inserts its bin directory onto the Windows PATH setting. Thus, all existing ODP.NET apps will then use this new installed version.
The problem that can arise is if you do not want all your ODP.NET instances using the same version. To support this scenario, you can specify the directory that each individual ODP.NET app should use to find its unmanaged DLLs via the DllPath setting in the Registry or .NET config file:
DLL search order discussed here:
http://docs.oracle.com/cd/E20434_01/doc/win.112/e23174/InstallODP.htm#sthref94
DllPath setting discussed here:
http://docs.oracle.com/cd/E20434_01/doc/win.112/e23174/featConfig.htm#BABCBFDJ

'System.AccessViolationException' occurred in method 'Read' of class 'OpsDa

Exception Stack Trace:_
An exception of type *'System.AccessViolationException'* occurred in method *'Read' of class 'OpsDac'*
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
The stack trace given is: at Oracle.DataAccess.Client.OpsDac.Read(IntPtr opsConCtx, IntPtr opsErrCtx, IntPtr opsSqlCtx, IntPtr& opsDacCtx, OpoSqlValCtx* pOpoSqlValCtx, OpoMetValCtx* pOpoMetValCtx, OpoDacValCtx* pOpoDacValCtx) at Oracle.DataAccess.Client.OracleDataReader.Read()
Environment Details:_
Oracle Database- Oracle Database 11g Enterprise Edition Release 1 (11.1.0.6) Patch set 11.1.0.7
ODP.NET- ODTwithODAC1110621- Oracle Data Access Components for Oracle Client 11.1.0.6.21
Downloaded ODP.NET from the below link- http://www.oracle.com/technology/software/products/database/oracle11g/111060_win32soft.html
*.NET Framework* – v3.5
ORM layer (Object Relation Mapping) - NHibernate (it is the data access layer used in my project- which internally uses ADO.NET in the background)
Coding Language - C#
Test Case:*
I don’t have a particular test case for this exception, but below is the similar code that caused the exception.
Code:_
void Main()
//Placeholder for saving ID of new record that is saved through ADO.
static decimal ADOSavedObjectID;
private ADONewTestRecord obj = new ADONewTestRecord();
//ADO.NET code to save this returns saved object db ID.
ADOSavedObjectID = SaveThroughADOViaNHibernate(obj);
//Fetch the Saved record through NHibernate.
TestNewRecordFromNHibernateViaADO = GetTestRecordThroughNHibernateViaADO(ADOSavedObjectID )
public decimal SaveThroughADOViaNHibernate(ADONewTestRecord obj)
//here we have NHibernate API to save the record which uses ADO.NET (sorry I am not providing any lines of code, as I don’t have the source code of NHibernate that is accessing –ADO.NET )
public TestNewRecordFromNHibernate
GetTestRecordThroughNHibernateViaADO(decimal ADOSavedObjectID)
// here we have NHibernate API to fetch the record which uses ADO.NET (sorry I am not providing any lines of code, as I don’t have the source code of NHibernate that is accessing –ADO.NET )
// Exception is raised.
Please share your thoughts on this exception in ODP.NET, and request me if you need any additional details.
Thanks

Hi,
How often does this occur? Is this consitently reproducible with certain code? Is it always that code that has the problem? Can you generally reproduce this in a test environment?
For issues regarding 3rd party libraries that cannot be reproduced with a source code testcase, I'd generally recommend testing latest software versions if that's an option.
If the behaivor still occurs on current versions, it may be best to open a SR with support so we can get some tracing, and also a memory dump of the access violation to see if we can match it to known issues. You can get a memory dump via setting ODP tracing to level 8, or also via the use of adplus, debugdiag, etc.
Hope it helps, but realize it may not,
Greg

Reading a ref cursor containing a cursor throws AccessViolationException

Apologies if this is a known bug. Documenting the simplest case I could find to reproduce it.
Oracle 10g Release 2 (10.2.0.1.0)
ODP.NET 2.102.2.10
Windows XP SP2 32-bit, .Net 2.0.50727
First, create a simple function that returns a very simple ref cursor:
=======================
create or replace function test_get_child_cursor
return sys_refcursor
is
     ret_results sys_refcursor;
begin
     open ret_results for
     select 1 as child_id from dual;
     return ret_results;
end;
=======================
Then try to execute a select that calls this function in ODP.NET:
=======================
OracleCommand cmd = conn.CreateCommand();
cmd.CommandText = "begin open :1 for select 1 as id, test_get_child_cursor() from dual; end;";
cmd.Parameters.Add("cur", OracleDbType.RefCursor, ParameterDirection.Output);
cmd.ExecuteNonQuery();
OracleDataReader reader = ((OracleRefCursor) cmd.Parameters["cur"].Value).GetDataReader();
while (reader.Read())
=======================
Getting the following error when calling reader.Read():
=======================
System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at Oracle.DataAccess.Client.OpsDac.Read(IntPtr opsConCtx, IntPtr opsErrCtx, IntPtr opsSqlCtx, IntPtr& opsDacCtx, OpoSqlValCtx* pOpoSqlValCtx, OpoMetValCtx* pOpoMetValCtx, OpoDacValCtx* pOpoDacValCtx)
at Oracle.DataAccess.Client.OracleDataReader.Read()
=======================
Is this a supported feature at all in this version of ODP.NET (i.e., reading from a ref cursor that contains other ref cursors)?
We have several places in our application where we'd like to get cursors containing cursors, so we just want to plan ahead if this is going to be supported.
Thanks,
Jeremy

Hello,
A bit old, but still relevant:
Cursor expression & .NET
Nested cursors are not supported by ODP.NET.
- Mark

System.AccessViolationException in clickonce deployment when starting WPF app

We see a lot of these errors on the production environment when launching our WPF clickonce application.
Can someone explain this error?
See here the error mentioned in the eventviewer.
Application: BrioShell.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException Stack:    at System.Deployment.Internal.Isolation.Manifest.IHashElementEntry.get_AllData()    at System.Deployment.Application.Manifest.File..ctor(System.Deployment.Internal.Isolation.Manifest.FileEntry)
   at System.Deployment.Application.Manifest.AssemblyManifest.get_Files()    at System.Deployment.Application.Manifest.AssemblyManifest.GetFilesInGroup(System.String, Boolean)    at System.Deployment.Application.ComponentStore.CheckGroupInstalled(System.Deployment.Application.DefinitionAppId,
System.Deployment.Application.Manifest.AssemblyManifest, System.String)    at System.Deployment.Application.SubscriptionStore.CheckGroupInstalled(System.Deployment.Application.SubscriptionState, System.Deployment.Application.DefinitionAppId, System.Deployment.Application.Manifest.AssemblyManifest,
System.String)    at System.Deployment.Application.DeploymentManager.SynchronizeGroupCore(Boolean, System.Deployment.Application.SyncGroupHelper)    at System.Deployment.Application.DeploymentManager.SynchronizeGroupAsyncWorker(System.Object)
   at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(System.Object)    at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)    at
System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()    at System.Threading.ThreadPoolWorkQueue.Dispatch()    at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
Greetings Ambionix

We are having the same problem. Initial async download of three file groups works fine (so directly after installation). On an upgrade, we kick off the async download again. It then always raises the error shown below, independent whether it is a VSTO add-in
or clickonce app. Our apps run as full trust on .NET 4.5.2.
Application: Invantive.Estate.App.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
Stack:
at System.Deployment.Internal.Isolation.Manifest.IHashElementEntry.get_AllData()
at System.Deployment.Internal.Isolation.Manifest.IHashElementEntry.get_AllData()
at System.Deployment.Application.Manifest.DependentAssembly..ctor(System.Deployment.Internal.Isolation.Manifest.AssemblyReferenceEntry)
at System.Deployment.Application.Manifest.AssemblyManifest.get_DependentAssemblies()
at System.Deployment.Application.Manifest.AssemblyManifest.GetPrivateAssembliesInGroup(System.String, Boolean)
at System.Deployment.Application.DownloadManager.AddDependencies(System.Deployment.Application.FileDownloader, System.Deployment.Application.Manifest.AssemblyManifest, System.Deployment.Application.Manifest.AssemblyManifest, System.Uri, System.String,
System.String)
at System.Deployment.Application.DownloadManager.DownloadDependencies(System.Deployment.Application.SubscriptionState, System.Deployment.Application.Manifest.AssemblyManifest, System.Deployment.Application.Manifest.AssemblyManifest, System.Uri,
System.String, System.String, System.Deployment.Application.IDownloadNotification, System.Deployment.Application.DownloadOptions)
at System.Deployment.Application.DeploymentManager.SynchronizeGroupCore(Boolean, System.Deployment.Application.SyncGroupHelper)
at System.Deployment.Application.DeploymentManager.SynchronizeGroupAsyncWorker(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()

Quicktime in winforms AccessViolationException

Hello,
I am using quicktime to play multiple movies in a winforms (.net) application.
When i play multiple movies (about 5 in debugging mode and 15 in release mode) i get an AccessViolationException.
I tried to set the URL to en empty string. I tried the disconnect function of the qtMovie object. I trief Updatemovie function but nothing works.
Does anybody here know why this error occurs?
I use: Quicktime control 2.0 & .net winfors 3.5

hi fantagon,
i'm also having similar problem. did you find solution?
thanks

AccessViolationException

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