ORA-24777 when trying to call multiple Oracle SPs...

Question

I had a SP in Oracle that called another SP in a SQL Server DB via DBLink. I was calling the Oracle SP from VB.NET (3.5) and because of transaction commiting I was not able to do this, so I removed the SQL SERVER SP call from inside the Oracle SP. However, I still get a ORA-24777 error: use of non-migratable database link not allowed.
If I removed the reference to the other DB, why would I still get an error referencing the DBLINK?
I'm using Oracle 10.2 and VB.NET (3.5).
old SP CODE:
I have a package called USP_VALIDATION
In the package body, I was calling BATCH(Queue, RefNo) [a procedure in USP_VALIDATION]
In this BATCH procedure, I would call SP_GET_BILLING_OPTION_TCIS(accNo, lclBillingOption) [note TCIS is the SQL DB and lclBillingOption would be the TCIS billing option]
... do something with lclBillingOption
I changed this to the following:
In the package body, I now call BATCH(Queue, RefNo, BillingOption)
In this new BATCH procedured, I now DON'T call SP_GET_BILLING_OPTION_TCIS as I already retrieved it first before I call USP_VALIDATION in the .NET code
... do something with the BillingOption passed in as a parameter when calling BATCH.
What I'm really trying to do is make sure that the transaction commitment/rollback is handled correctly in the following senario.
What happened before was because the one SP was calling another SQL database via DBLINK, it was not working correctly. So we removed the DBLINK and now call the SQL database before we do any action with the Oracle SPs.
Here is my code in .NET:
Public Function EnrollElectricCustomer(ByVal EnrollParameters As IEnrollmentParameters) As IEnrolleSearch Implements Interfaces.IEnrollmentManager.EnrollElectricCustomer
        Dim dacRCES As New Dac.RC.EnrolleeDataService()
        Dim dacRCAS As New Dac.RC.AccountDataService()
        Dim oServiceType As IServiceType = New ServiceType(ServiceTypeEnum.Gas)
        Dim dacCSS As New Dac.Css.CssCustomerAccount
        Dim oBillingOption As IBillingOption = Nothing
        Dim business As New AccountManager
        Dim WorkQID As Long = 0
        Dim enrolleeSearch As EnrolleeSearch = Nothing
        Dim MainTranScope As TransactionScope = New TransactionScope(TransactionScopeOption.RequiresNew)
        Try
            EventLog.WriteEntry("RCIS", "Access --> EnrollElectricCustomer")
            ' comment - here I go to SQL Server to get the Billing Option instead of doing it thru DBLINK
            oBillingOption = dacRCAS.GetCurrentBillingOption(EnrollParameters.CssAccountNumber, oServiceType)
            Using MainTranScope
                'first save the Enrollment record to the Enroll Queue
                WorkQID = dacRCES.SaveElectricEnrollee(EnrollParameters)
                'need to put account number needed into a collection
                Dim oColAccounts As New Generic.List(Of IAccountRefreshRequests)
                Dim oColCSSAccounts As New Generic.List(Of ICustomerAccount)
                Dim oAccount As New AccountRefreshRequests
                Dim oCustomerAccount As ICustomerAccount
                Dim refreshstring As String = String.Empty
                oAccount.CSSAccountNumber = EnrollParameters.CssAccountNumber
                oAccount.CSSAccountNumberNoCheckDigit = EnrollParameters.CssAccountNumber.Substring(0, 14)
                oAccount.CSSCheckDigit = EnrollParameters.CssAccountNumber.Substring(14, 1)
                oAccount.ServiceType.CodeString = "E"
                Dim rStatus As New RefreshStatus
                rStatus.Code = StatusEnum.NewAccount
                oAccount.Status.CodeString = rStatus.CodeString()
                oColAccounts.Add(oAccount)
                'call CSS passing in collection of account(s) and returning back collection of account(s)
                oColCSSAccounts = dacCSS.GetCssAccountInfo(oColAccounts)
                oCustomerAccount = New CustomerAccount
                oCustomerAccount = oColCSSAccounts.Item(0)
                refreshstring = business.BuildRefreshString(oCustomerAccount)
                dacRCES.RefreshElectricAccount(refreshstring)
                'once refreshed, we need to also run VALIDATION on this enrollent record...
*' NOTE THAT THIS SP used to CALL SQL via DBLINK but no longer does....*               
                dacRCES.ValidateElectricEnrollment(WorkQID,oBillingOption)
                'once validated, we also have to submit the record....
                dacRCES.SubmitElectricEnrollment(WorkQID)
                MainTranScope.Complete()
            End Using
            If WorkQID > 0 Then
                'now we need to retrieve the account enrollment record...
                enrolleeSearch = dacRCES.FindEnrolleeByEnrollID(WorkQID, ServiceTypeEnum.Electric)
            End If
        Catch ex As Exception
            SendEmail.SendErrorEmail("EnrollElectricCustomer --> " & EnrollParameters.CssAccountNumber, ex.Message)
            RcCommon.WriteExceptionToLog(ex)
            Throw
        End Try
        Return enrolleeSearch
    End FunctionI'm concerned that if any one of the various calls fails, I want to rollback the ENTIRE transaction. Right now I
a) insert the row into a table in Oracle,
b) get detailed information on this account from another database (DB2),
c) refresh the data in the Oracle DB on this account,
d) validate the record added (business rules) and then when all done,
e) to submit the account (which changes statuses for later use).
If I insert the record but it fails at step d say, I want to rollback everything and remove the record from the Oracle table...
Edited by: userLynx on Oct 17, 2012 6:37 AM

Answer 1

EDIT1:
You posted an edit including code while I was typing original response.
You may find the following My Oracle Support note helpful. It applies to ODP.NET as well.
ORA-24777 When Selecting Across a Database Link With Microsoft OLE DB Provider for Oracle [ID 397555.1]
Just to confirm - is the database link used at all now?
I know you said that the stored procedure is no longer called, but is the link still used for anything else?
Also, do you have a call stack from when the exception is raised?
Edited by: Mark Williams on Oct 17, 2012 9:53 AM