>>>Copy memo contents to (lcTempFile)
>>>ERASE (lcFile)
>>>COPY FILE (lcTempFile) TO (lcFile)
>>>
>>>Would that still give an error?
>>
>>The file name is already unique and the path is supposed to be local path - ProgramData directory on user's machine.
>>
>>However, the user uses Citrix and I don't know how this fact contributes into the problem.
>
>I thought with this workaround you could better isolate the problem to the copy command, or alternatively use Filesystemobject to do the copying to the final destination.

I already changed that code to use extra try/catch and sys(2015) + Application.ThreadID instead of sys(3) which was used before. Now I'm waiting for he client to test these changes to see, if they fix the error or not.