Catch Checksum Error

Is it possible to change the checksum error message to a more user-friendly message? If not, is it possible to catch a checksum error to handle it like any other error in an exception handler?
Regards,
Matt

Hi,
Its possible using apex_item.md5_checksum function
Check this out:
http://download.oracle.com/docs/cd/E14373_01/apirefs.32/e13369/apex_item.htm#CHDHHGIG
http://www.oracle.com/technology/products/database/application_express/howtos/tabular_form.html
Regards,
Shijesh

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CMOS Checksum Error on MSI 785GM-E51

Hi, I have 2 years old MSI 785GM-E51. Approximately 2 - 3 months ago, my PC just go hang without any reasons, even the mouse / keyboard won't respond to anything.
After I reset, sometimes it's fine, but sometimes it's hang again, the interval is random. Sometimes it even hang when in the POST or when i enter BIOS setting.
After several restart, it's sometimes gives me CMOS Checksum Error, so I decided to reset the CMOS using jumper method. After that my PC just works normal.
Until a week ago, my pc start to hang randomly again, the symptom is similar but this time sometimes it's not hang, but the PC just restart immediately with black / white / blue random pattern
displayed momentarily on the screen. And it always display CMOS Checksum Error. I already tried reinstalling Windows, and updating BIOS via flash disk from Live Update 5, no use.
I already tried to plug out my VGA and using the onboard one, still crash / hang randomly. I also test Memtest overnight with passing 11 pass without error.
Is it my motherboard already dead? or it's my PSU? CPU?
Here is my complete specs:
AMD Phenom II X4 955BE
MSI 785GM-E51
DDR3 Dual Channel 4GB RAM (corsair, forgot the model)
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Quote
Yesterday i desperate enough and change some BIOS settings, and
surprisingly, the CPU is much cooler!
Try entering bios, hitting f6 for optimized defaults then save and exit. See if problem persists.
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As far as I remember, no, the crash / hang time i remembered is when POST / boot / startup / browsing / install app / playing games / copy file.
And one more thing, when it hangs, it really hangs, not just the windows, sometimes it even not respond to reset button, so i have to power it off. But sometimes it respond
to reset button, but with quite a long delay, it could half a minute i think.
Have you tried re-seating the cpu,memory and all of the power connectors etc?
What are the amp ratings on the 12v rail of the PSU? I found this on thier website but dont have time to dig furthur: Quote
4-Channel 12V Rails Design
Although the VGA you list only needs 24a on a 12v rail.
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what's cpuid / ram timings / spd? where i can look at it?
http://www.cpuid.com/
When the program opens, take a screen shot of the tab that describe how your ram is running, It will show the current timings,speed, single or dual channel. Also take a ss of the spd tab, which will show the jdec standards that apply to that ram and the xmp profile. Then post the SS's to imageshack or the link and link them.

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I use BAPI L_TO_CREATE_MULTIPLE. If, for example, I put a warehouse that not is the warehouse of the unit that I want to move, I receive an error that isn't in exceptions.
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Hello Jose
BAPIs must not raise any exceptions. Why? Because they are intended for external use. However, if you raise an exception during a RFC call the connection will break down. Therefore BAPIs collect the error message in their (usually named) RETURN parameter.
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How can I configure ReFS to NOT fail read operations when a checksum error is detected (on non-Storage-Spaces volumes where data integrity streams are enabled)?

According to William Stanek, in his Windows Server 2012 R2 Inside Out: Configuration, Storage & Essentials book, this is apparently possible: (pg. 615 - here it is on Google Books: https://books.google.ca/books?id=0IyfBAAAQBAJ&pg=PT819&lpg=PT819&dq=read+operation )
Integrity can be enabled when the system is not running on Storage Spaces. When
integrity is enabled and ReFS detects a checksum mismatch, ReFS logs an event and
fails the read operation by default. If you don’t want the read operation to fail, you
can configure ReFS to continue with the read operation. A related event will be logged
regardless.
So then how do I configure it to do that???
(And just to make it super-clear, I'm NOT using Storage Spaces, so there is no redundancy via mirroring/parity, and I'm not expecting any file repair - just detection of corruption. It's just a basic volume formatted with ReFS and
with integrity streams enabled, via format E: /fs:ReFS /i:enabled
For those who want more details, here's the situation:
I try to perform a read operation on a file with corrupted data (purposely done for testing using a low-level disk editor), I get a the following error message:
And an event ID 133 from ReFSv1 gets logged in the System log:
Clicking "Try Again" just brings up the same message, and clicking "Skip" skips the operation entirely.
This is indeed the correct default behaviour.
What I want instead is for the read operation to be allowed to complete, with corrupt data and all, and ONLY for the event to be logged. And according to William Stanek, this is supposed to be configurable somewhere - and after hours of searching, I haven't
been able to find anything.

Hi Tommy,
>>How can I configure ReFS to NOT fail read operations when a checksum error is detected
We can use PowerShell command Set-FileIntegrity to configure this. The specific parameter for controlling this behavior is
-Enforce <Boolean>which indicates whether to enable blocking access to a file if integrity streams do not match the data.
Regarding this point, the following article can be referred to as reference.
Set-FileIntegrity
https://technet.microsoft.com/en-us/library/jj218351.aspx
Best regards,
Frank Shen
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected]

Could not validate SPNEGO token.java.lang.Exception: Checksum error.

Hello consultant:
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15:45:20:078 Error J2EE_GST_PRD SAPEngine_Application_Thread[impl:3]_15 ~p.security.spnego.krb5.crypto.DesCrypto Checksum error! checksum: 0xc46bfed8d0dbc54221ee75405c8cd5ac; calculated checksum: 0x6ead7e801608b729a6957597327f2ba5
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<< Do not post the same question across a number of forums >>

Catch the error in to a log file

Hi Team,
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Try
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As mjolinor pointed, you should change the -ErrorAction to Stop to make the control flow into catch block when error occurs. Just change alone is not sufficient because, the control will go to catch block if any of the computer in servername.txt gives error,
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Hope this helps.
Thanks,
Sitaram Pamarthi
Blog : http://techibee.com
Follow on Twitter
This posting is provided AS IS with no warranties or gurentees,and confers no rights
You can simplify that to:
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Hi experts,
I created a java mapping to validating the input xml content with xsd schema (schema validation). What I want is to catch all error message to the xml not just the first error. I used SAXParser in sapxmltoolkit.jar to do the schema validation. The below is a part of my java mapping.
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com.sap.engine.lib.xml.parser.NestedSAXParserException: Fatal Error: com.sap.engine.lib.xml.parser.ParserException:
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cvc-simple-type : information item '/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]/:CityName[1]' is not valid, because it's value does not satisfy the constraints of facet 'minLength' with value '1'.
cvc-data : information item '/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]/:CityName[1]' is is not valid with respoct to the corresponding simple type definition.
cvc-element : element information item '/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]/:CityName[1]' is associated with invalid data.
cvc-element : element information item '/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]' is not valid with respect to it's complex type definition..
cvc-element : element information item '/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]' is not valid with respect to it's complex type definition..
cvc-element : element information item '/:ShipNotice[1]/:Header[1]/:To[1]' is not valid with respect to it's complex type definition..
cvc-element : element information item '/:ShipNotice[1]/:Header[1]' is not valid with respect to it's complex type definition..
cvc-element : element information item '/:ShipNotice[1]' is not valid with respect to it's complex type definition..
-> com.sap.engine.lib.xml.parser.ParserException:
I tried using Xerces and JAXP to do validation, the same error happened. I have no idea on this. Does xi has its own error handler logic? Is there any body can make me get out of this?
Thanks.

<h6>Hi experts,
<h6>
<h6>I created a java mapping to validating the input xml content with xsd schema (schema validation). What I want is to catch all <h6>error message to the xml not just the first error. I used SAXParser in sapxmltoolkit.jar to do the schema validation. The below <h6>is a part of my java mapping.
<h6>XMLReader parser = XMLReaderFactory.createXMLReader("com.sap.engine.lib.xml.parser.SAXParser");
<h6>parser.setFeature( "http://xml.org/sax/features/validation" , true);
<h6>parser.setFeature( "http://apache.org/xml/features/validation/schema" , true);
<h6>parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaLanguage", "http://www.w3.org/2001/XMLSchema");          <h6>parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaSource",this.getClass().getClassLoader().getResourceAsStream(schema)); <h6>// schema is my schema name
<h6>parser.setErrorHandler(new ParseErrorHandler()); // ParseErrorHandler is my own ErrorHandler which extends Default Handler
<h6>parser.parse(new InputSource(new ByteArrayInputStream(sinput.getBytes())));
<h6>
<h6>// In error handler, I comment all code so as not to throw any exception
<h6>public class ParseErrorHandler extends DefaultHandler
<h6>{
<h6>     public void error(SAXParseException e) throws SAXException
<h6>     {
<h6>          // sSystem.out.println("Error" + e.getMessage());
<h6>          // throw e;
<h6>     }
<h6>
<h6>     public void fatalError(SAXParseException e)
<h6>     {
<h6>          // throw e;
<h6>          // System.out.println("SAP Fatal Error" + e.getMessage());
<h6>
<h6>     }
<h6>
<h6>}
<h6>
<h6>Unfortunately the program always stopped while catching the first error. Check the below log.
<h6>
<h6>com.sap.engine.lib.xml.parser.NestedSAXParserException: Fatal Error: com.sap.engine.lib.xml.parser.ParserException:
<h6>ERRORS :
<h6>cvc-simple-type : information item <h6>'/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]/:CityName[1]' <h6>is not valid, because it's value does not satisfy the constraints of facet 'minLength' with value '1'.
<h6>cvc-data : information item <h6>'/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]/:CityName[1]' <h6>is is not valid with respoct to the corresponding simple type definition.
<h6>cvc-element : element information item <h6>'/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]/:CityName[1]' <h6>is associated with invalid data.
<h6>cvc-element : element information item <h6>'/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]/:AddressInformation[1]' <h6>is not valid with respect to it's complex type definition..
<h6>cvc-element : element information item <h6>'/:ShipNotice[1]/:Header[1]/:To[1]/:PartnerInformation[1]' <h6>is not valid with respect to it's complex type definition..
<h6>cvc-element : element information item <h6>'/:ShipNotice[1]/:Header[1]/:To[1]' <h6>is not valid with respect to it's complex type definition..
<h6>cvc-element : element information item <h6>'/:ShipNotice[1]/:Header[1]' <h6>is not valid with respect to it's complex type definition..
<h6>cvc-element : element information item '/:ShipNotice[1]' is not valid with <h6>respect to it's complex type definition..
<h6> -> com.sap.engine.lib.xml.parser.ParserException:
<h6>
<h6>
<h6>I tried using Xerces and JAXP to do validation, the same error happened. I have no idea on this. Does xi has its own error <h6>handler logic? Is there any body can make me get out of this?
<h6>Thanks.

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Scenario:
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I dont really understand the torrent part of the story.
Sorry - I wasn't that much clear and my english doesn't help
A torrent file can be used for an integrity check of the file: not only it reports if the checksum is right or wrong, but - in this latter case - it can tell you that there are missing pieces in the file and how many.
Hmm and it sounds like pc B isnt that healthy
I checked for filesystem sanity in both PCs, and I also run the Seagate diagnostic tool on both of them. The chance that 4 hard disk are failing at the same time in the same PC is negligible. Anyway, I'm open to suggestions here - maybe it's an hardware issue, but I don't think it's related to the hard disks.
what if you try it with an usb stick ??
I'll try copying files to an external drive and to another PC - thanks for the idea
try to check the size of the file you copy if there are both equal.
They aren't - otherwise I won't get that checksum error. The difference is usually small, though - only a few kbytes: it seems to me that the copy process doesn't end properly.

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Message was edited by: Spring Tang
inital
Message was edited by: Spring Tang
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Message was edited by: Spring Tang
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Solaris 10 express developer ed. dvd checksum error

Hi,
I downloaded the solaris 10 express developer ed. dvd. I used Sun Download manager for the download. the file e had checksum error. Hence the DVD contains checksum error. Is there any way we could correct the download without the need re-download the entire file. Other files ending a,b,c,e dont have this problem. Am i the only one getting this problem or is it a known issue?
with regards,
ashwin

Sorry there is no real way to solve this other than downloading the last segment of the file.

Checksum error in Manual Tabular Form

Hi everyone,
I have created 2 (manual tabular forms) on a same page but i am getting checksum error for one of the tabular form.
Here is my code:
1 st Tabular Form:
select
x.del,
x.ECGEXST_ID,
x.LEAD_CD,
x.ST_ID,
x.ENTERED_DTS,
X.ENTERED_BY_NM,
X.UPDATED_DTS,
X.UPDATED_BY_NM,
x.cks
from (
select
htmldb_item.checkbox(1,ECGEXST_ID) del,
htmldb_item.hidden(2,ECGEXST_ID) ECGEXST_ID,
htmldb_item.select_list_from_query (3, LEAD_CD,'select lead_cd , lead_cd from lslead order by display_seq ',15) LEAD_CD,
htmldb_item.select_list_from_query(5,ST_ID,'select lkup_dsc,lkup_id from lkup where lkup_grp_id = 17',25) ST_ID,
wwv_flow_item.display_and_save(6,to_char(ENTERED_DTS,'MM/DD/YYYY')) ENTERED_DTS,
au.LAST_NM || ', ' || au.FIRST_NM ENTERED_BY_NM,
wwv_flow_item.display_and_save(7,to_char(UPDATED_DTS,'MM/DD/YYYY')) UPDATED_DTS,
au1.LAST_NM || ', ' || au1.FIRST_NM UPDATED_BY_NM,
htmldb_item.md5_checksum(ECGEXDT_ID,LEAD_CD,ST_ID,ENTERED_DTS,ENTERED_BY_MSPR_ID) cks
from ECGEXST,
app_user au,app_user au1 where au.MSPR_ID(+) = ECGEXST.ENTERED_BY_MSPR_ID and au1.MSPR_ID(+) = ECGEXST.UPDATED_BY_MSPR_ID
and ECGEXDT_ID = :P65_ECGEXDT_ID
union all
select
htmldb_item.checkbox(1,null) del,
htmldb_item.hidden(2,null) ECGEXST_ID,
htmldb_item.select_list_from_query (3,null,'select lead_cd , lead_cd from lslead order by display_seq ',15) LEAD_CD,
htmldb_item.select_list_from_query(5,null,'select lkup_dsc,lkup_id from lkup where lkup_grp_id = 17',25) ST_ID,
wwv_flow_item.display_and_save(6,null) ENTERED_DTS,
null ENTERED_BY_NM,
wwv_flow_item.display_and_save(7,null) UPDATED_DTS,
null UPDATED_BY_NM,
htmldb_item.md5_checksum(null,null,null,null,null) cks
from dual) x
UPDATE PROCESS:
declare
l_cks wwv_flow_global.vc_arr2;
j pls_integer := 1;
val1 varchar2(100);
val2 varchar2(100);
begin
-- Get original MD5 checksum
select wwv_flow_item.md5(ECGEXDT_ID,LEAD_CD,ST_ID,ENTERED_DTS,ENTERED_BY_MSPR_ID) cks
BULK COLLECT INTO
l_cks
from ECGEXST where ECGEXDT_ID = :P65_ECGEXDT_ID;
-- Compare the original checksum, l_cks,
-- with submitted checksum, htmldb_application.g_fcs.
-- If they are different, raise an error.
for i in 1..l_cks.count
loop
if htmldb_application.g_fcs(i) != l_cks(i) then
rollback;
raise_application_error(
          -20001,
     'Current version of data in database has changed '||
          'since user initiated update process.');
-- return;
end if;
end loop;
-- update ECGRSTST
for i in 1..htmldb_application.g_f02.count
loop
if htmldb_application.g_f02(i) is not null then
update ECGEXST
set
ECGEXDT_ID = :P65_ECGEXDT_ID,
LEAD_CD = replace(htmldb_application.g_f03(i),'%'||'null%',NULL),
ST_ID = replace(htmldb_application.g_f05(i),'%'||'null%',NULL)
where ECGEXST_ID = htmldb_application.g_f02(i);
else
if htmldb_application.g_f03(i) is not null then
insert into ECGEXST
(ECGEXST_ID ,
ECGEXDT_ID,
LEAD_CD,
ST_ID)
values
(ECGEXST_SEQ.nextval,
:P65_ECGEXDT_ID,
replace(htmldb_application.g_f03(i),'%'||'null%',NULL),
replace(htmldb_application.g_f05(i),'%'||'null%',NULL));
end if;
end if;
end loop;
end;
The first tabular form is working fine.But for the second tabular form i am getting the checksum error.I have created a test table and checked the checksum values.The checksum values are changing.
Here is the code of my 2nd tabularform:
select
x.del,
x.ECGEXT_ID,
x.LEAD_CD,
x.T_ID,
x.ENTERED_DTS,
X.ENTERED_BY_NM,
X.UPDATED_DTS,
X.UPDATED_BY_NM,
x.cks
from (
select
htmldb_item.checkbox(11,ECGEXT_ID) del,
htmldb_item.hidden(12,ECGEXT_ID) ECGEXT_ID,
htmldb_item.select_list_from_query (13, LEAD_CD,'select lead_cd , lead_cd from lslead order by display_seq ',15) LEAD_CD,
htmldb_item.select_list_from_query(15,T_ID,'select lkup_dsc,lkup_id from lkup where lkup_grp_id = 18',25) T_ID,
wwv_flow_item.display_and_save(16,to_char(ENTERED_DTS,'MM/DD/YYYY')) ENTERED_DTS,
au.LAST_NM || ', ' || au.FIRST_NM ENTERED_BY_NM,
wwv_flow_item.display_and_save(17,to_char(UPDATED_DTS,'MM/DD/YYYY')) UPDATED_DTS,
au1.LAST_NM || ', ' || au1.FIRST_NM UPDATED_BY_NM,
htmldb_item.md5_checksum(ECGEXDT_ID,LEAD_CD,T_ID,ENTERED_DTS,ENTERED_BY_MSPR_ID) cks
from ECGEXT,
app_user au,app_user au1 where au.MSPR_ID(+) = ECGEXT.ENTERED_BY_MSPR_ID and au1.MSPR_ID(+) = ECGEXT.UPDATED_BY_MSPR_ID
and ECGEXDT_ID = :P65_ECGEXDT_ID
union all
select
htmldb_item.checkbox(11,null) del,
htmldb_item.hidden(12,null) ECGEXT_ID,
htmldb_item.select_list_from_query (13,null,'select lead_cd , lead_cd from lslead order by display_seq ',15) LEAD_CD,
htmldb_item.select_list_from_query(15,null,'select lkup_dsc,lkup_id from lkup where lkup_grp_id = 18',25) T_ID,
wwv_flow_item.display_and_save(16,null) ENTERED_DTS,
null ENTERED_BY_NM,
wwv_flow_item.display_and_save(17,null) UPDATED_DTS,
null UPDATED_BY_NM,
htmldb_item.md5_checksum(null,null,null,null,null) cks
from dual) x
UPDATE PROCESS:
declare
l_cks wwv_flow_global.vc_arr2;
j pls_integer := 1;
val1 varchar2(100);
val2 varchar2(100);
begin
-- Get original MD5 checksum
select wwv_flow_item.md5(ECGEXDT_ID,LEAD_CD,T_ID,ENTERED_DTS,ENTERED_BY_MSPR_ID) cks
BULK COLLECT INTO l_cks
from ECGEXT where ECGEXDT_ID = :P65_ECGEXDT_ID;
-- Compare the original checksum, l_cks,
-- with submitted checksum, htmldb_application.g_fcs.
-- If they are different, raise an error.
for i in 1..l_cks.count
loop
if htmldb_application.g_fcs(i) != l_cks(i) then
-- val1 := htmldb_application.g_fcs(i);
-- val2 := l_cks(i);
-- insert into test2 (val_1,val_2) values (val1,val2);
rollback;
raise_application_error(
     -20001,
     'Current version of data in database has changed '||
     'since user initiated update process.');
return;
end if;
end loop;
-- update ECGRSTST
for i in 1..htmldb_application.g_f12.count
loop
if htmldb_application.g_f12(i) is not null then
update ECGEXT
set
ECGEXDT_ID = :P65_ECGEXDT_ID,
LEAD_CD = replace(htmldb_application.g_f13(i),'%'||'null%',NULL),
T_ID = replace(htmldb_application.g_f15(i),'%'||'null%',NULL)
where ECGEXT_ID = htmldb_application.g_f12(i);
else
if htmldb_application.g_f13(i) is not null then
insert into ECGEXT
(ECGEXT_ID ,
ECGEXDT_ID,
LEAD_CD,
T_ID)
values
(ECGEXT_SEQ.nextval,
:P65_ECGEXDT_ID,
replace(htmldb_application.g_f13(i),'%'||'null%',NULL),
replace(htmldb_application.g_f15(i),'%'||'null%',NULL));
end if;
end if;
end loop;
end;
please help me in solving this.The same code its good for one tabular form and for the other it giving the checksum error.
Thanks in advance
phani

Hi patrick,
Thanks for the reply i am getting the checksum error even if i used my primary key in the select statement of the MD5 checksum.
My primary key in the second tabular form is
htmldb_item.hidden(12,ECGEXT_ID) ECGEXT_ID
so i changed the process to:
for i in 1..htmldb_application.g_f12.count
loop
if htmldb_application.g_f12(i) is not null
then
select wwv_flow_item.md5(ECGEXDT_ID,LEAD_CD,T_ID,ENTERED_DTS,ENTERED_BY_MSPR_ID) cks
BULK COLLECT INTO l_cks
from ECGEXT where ECGEXT_ID = htmldb_application.g_f12(i);
-- Compare the original checksum, l_cks,
-- with submitted checksum, htmldb_application.g_fcs.
-- If they are different, raise an error.
if htmldb_application.g_fcs(i) != l_cks(i) then
-- val1 := htmldb_application.g_fcs(i);
-- val2 := l_cks(i);
-- insert into test2 (val_1,val_2) values (val1,val2);
rollback;
raise_application_error(
     -20001,
     'Current version of data in database has changed '||
     'since user initiated update process.');
end if;
end if;
end loop;
It's not possible to use BULK COLLECT to get the MD5 checksum of all >>>rows. Because the index positions in the MD5 array and the >>>apex_application.g_fxx array index will probably not match, especially if you >>>don't order or if you are on a second page.How come the first tabular form is running i used the bulk collect in the first tabular form
HERE IS THE CODE FOR THE FIRST TABULAR FORM:
-- Get original MD5 checksum
select wwv_flow_item.md5(ECGEXDT_ID,LEAD_CD,ST_ID,ENTERED_DTS,ENTERED_BY_MSPR_ID) cks
BULK COLLECT INTO
l_cks
from ECGEXST where ECGEXDT_ID = :P65_ECGEXDT_ID;
-- Compare the original checksum, l_cks,
-- with submitted checksum, htmldb_application.g_fcs.
-- If they are different, raise an error.
for i in 1..l_cks.count
loop
if htmldb_application.g_fcs(i) != l_cks(i) then
rollback;
raise_application_error(
          -20001,
     'Current version of data in database has changed '||
     'since user initiated update process.');
-- return;
end if;
end loop;

Catching all errors

Hi
is there a way to catch all errors, I know you can do try and
catch fro your code
about how about errors that come from built in Flex component
I am trying to catch all errors and show it to the user in
better format
but most important, it seems flex will be frozen and you can
do anything if the error is not caught and the only way around it
to restart your browser
Please help
Thanks
Kasem

Everything I read suggests that this isn't possible in Flex.
It seems that uncaught exceptions are handled by the Flash player.
This link discusses the problem in Flex 1.5 and it notes the
problem is not fixed in Flex 2.
http://www.mail-archive.com/[email protected]/msg25874.html
I'm going to continue to look. I really can't imagine that
Adobe spent all that time reworking Flex and didn't address this
problem.

Catch Checksum Error

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