Do you really need more than 127 ?
Or are your trying to run a clipper application that gives you the wrong errormessage ?

Hello, it seems the application needs 250 file handles.

The error message is probably misleading, it thinks there is a data integrity error, but I'm pretty sure it's file handles.

I *think* the application is indeed a Clipper one, it uses dbfs etc.

it doesn't 😀
Set core=normal
and the error will go away.

It didn't help.

Are you 100% certain you set it correctly ? As clipper needs an exception that is not being detected by the auto/dynamic core.

1mount c c:\whatever
2c:
3core
4(check the answer, probably auto)
5core normal
6core 
7(check answer again)
8run your app (in this same session)

No - I haven't had access to the users systems yet...

I have forwarded your note though - thank you