If you are familiar with C compilers, DCU's (Delphi Compiled Units) are more or
less .obj files in C. Using "Debug DCUs" will simply allow you to trace into
code that you would not normally be able to when compiled normally (because
there are no debug symbols to help).

I think your best friend would be the stack tracer.

Jason

> Hi Si,
>
> Thank you for your suggestions.
>
> I think you may be losing me a little here with something outside of
> my limited knowledge. I am using VCL components, is using Debug DCUs
> not not an option for CLX components only? At least that is how it
> sounds when I read the information about compiler options in the
> help file. Also, since I don't have the source code for the
> Interbase Express components (or at least I don't know where it is),
> I don't think I can recompile the application to use Debug DCUs for
> them.
>
> Please feel free to shed some light on my ignorance if you find it
> appropriate to do so.
>
> I will try some new tests using FreeAndNil instead of Free alone and
> see if that can help me getting around the problem.
>
> Best regards,
> ----
> Philippe