>>>My code line where the error was pointing is exactly like this:
>>>
>>>

>>>use in select("c_inventory")
>>>

>>
>>How many tables do you have opened? I think this error is indication of something else.
>
>You could be on to something. I initially open about 100 tables. But then the process creates cursors (by calling SQL Server). And the program does it a lot. Could it be that if I don't close these cursors properly the program is running out of some handles?

Yes, it's a possibility. Try closing the cursors once you don't need them. I think I did get this error also once, but I forgot the circumstances...