Are you running under VFP on the NT workstation? I know that older versions of foxpro would ignore errors on a line in some situations (but I thought it was only on if statements)

If the line is really select 3oh, instead of select 30, then it might select 3 on earilier versions.

This is a weird error, good luck!

>I'm running an *old* app written in FP2.6 for DOS on a Windows 95 PC with no problem.
>
>When I run the same app on an NT workstation, I get "Invalid database number" on the line
>
>SELECT 30
>
>Any ideas what causes this?
>
>TIA