BI Administration Tool crashes in nqsdbgatewayodbc35.dll

Question

Hi,
In the Oracle BI Administration Tool (v 11.1.1.5) we import metadata of an ODBC 3.5 datasource into the "Physical" layer. This works fine, but when I click to "View data..." on an ODBC table, the whole Administration Tool crashes with the following output: "*Unhandled exception at 0x6e9281ff in admintool.exe: 0xC0000005: Access violation reading location 0x00030028.*"
Note that the ODBC driver used is our custom implementation and it conforms to ODBC standard 3.5
When debugging the application at the moment where it crashes, the call stack is:
nqsdbgatewayodbc35.dll!6e9281ff()      
[Frames below may be incorrect and/or missing, no symbols loaded for nqsdbgatewayodbc35.dll]
......the driver's debug symbols are loaded and it is obvious that the driver code is not directly involved in the crash.
Analyzing our driver's logfile, I can see that the tool crashes after calling SQLExecute() - which returns successfully - but before calling SQLFetch().
Even more interesting, if I remove some fields from the table in "Physical" layer and only leave numeric type fields, suddenly "View Data..." returns the table's content.
Anyone knows of a bug in nqsdbgatewayodbc35.dll which might cause this issue?
Does anyone have an idea of how to investigate this? A debug symbol file (.PDB) for the nqsdbgatewayodbc35 DLL doesn't seem to be available.
Where do I find the logfile for the BI Admin Tool? Can detailed logging be turned on?
Help or hints appreciated,
Thanks!
Juraj

Answer 1

Hi Adil,
For one of our products - a position keeping system - we have an in-house ODBC driver through which business data can be extracted, e.g. for reporting purposes.
Juraj