Access violation in psqlodbcw.dll

Hello community,

I have a problem with psqlODBC (08.02.05). I'm using Delphi 6 (6.240 UP2), TADOQuery, PostgreSQL 8.2.4.

When I call TADOQuery.Open stored function raises exception:

ERROR: column "arg_last_datetime" doesn't exists.
State SQL:42703
Context:PL/pgSQL function "deliveries_visits_export3" line 40 at for over select rows

Then TADOQuery raises "destructive exception" and after that any other query executions in my program raise exception "Connection is already in use".

I tryed to execute query in design-time and got "access violation" in psalodbcw.dll

Please help me find out where the problem is.
Thank you.

Regards,
Sergei Demyanenko