I have no idea what could be going on.

Perhaps you could get the callstack when the error happens?

Jason

> -----Original Message-----
> From: Adomas Urbanavicius [mailto:adomas@...]
> Sent: Thursday, March 03, 2005 8:11 AM
> To: IBObjects@yahoogroups.com
> Subject: [IBO] Call To An OS function failed
>
>
>
> Hi,
>
> After leaving application for a long time (approx 2-4h) to
> live (just
> simple window is hanging with grid of data is displayed,
> and I am for
> example browsing www, or doing other jobs), I receive error :
>
> "Call To An OS function failed"
> After click "OK",
> this does not affect any of program futher and previous working.
> Anyway it sounds like a little scary..
>
> Any ideas ?
> PS. App : TIBOQuery *, FB.
>
> Adomas