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Hello.
I removed the transaction start/commit and it worked successfully.
But we can not work without transactions.

Hello,

Try to reproduce the problem on a "clean" PC (without Delphi and our dbExpress driver), having copied only the application and the dbexpoda.dll library, installed and configured the Oracle client.

Hello.
All our clients are working on "clean" PC. Today I ran the test from one of them. Error same, but in other iterations.
First pressing the button gives an error for the third time:
"Access violation at addess 013629C3 in module 'dbexpoda.dll'. Read of address 0175C000 i=3"
Second pressing the button gives an error immediately:
"Access violation at addess 013629C3 in module 'dbexpoda.dll'. Read of address 0175C000 i=1"
The third and subsequent pressing does not make mistakes.

2007 driver (dbexpoda.dll) works fine with no errors.
The bug had appeared in the driver 2012.

Hello.
You have this test works, or gives an error?

Hello,

We cannot reproduce the problem on our servers and PCs. If you are able to open remote access to your Oracle server, we will try to reproduce the problem on your real server.

Hello,
I sent you a dump of the database, which can be observed error.
Please, try to find the error.

Hello,
do you found an error?
Whether to give the remote access?
Remote desctop or remote SQL?

Hello,

Unfortunately, we couldn't raise your dump due to errors. If you can open access to your server (ip, port, sid, login, password) for us, please send this data to my e-mail - and we will check this problem directly on your DB.

Hello,
remote access is opened

Hello,

I've received your letter, however, when attempting to connect, Oracle returns the Unknown SID error. Please send the record from the tnsnames.ora file for connection to your server.

Hello,

Thank you for the information, we have reproduced the problem and will try to fix it as soon as possible. Please don't close access to your server in order for us to be able to test the fix. As soon as we fix the problem, we will inform you.

Hello,
have you finished testing? What are the results?
We would like to close the connection to the test server.

Hello,

We have reproduced the problem only on some PCs, therefore please don't close access in order for us to investigate the reasons for the error occurrence more deeply.

Hello,

We have already fixed this problem, please send us your license number and e-mail to alexp*devart*com in order for me to send you the fixed version of dbExpress driver for Oracle.

My developer license number is CRDBO-00983.

[email protected]

Thank you in advance