Thanks Arto this gets me a work around, still want to find the reason why though as i use the same classes in other applications with no problems.
Slán
~M

>I'v the same problem. After opening and closing a form (even without saving it) rebuilding app gives same error than you have.
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>

>Compiling d:\program files\microsoft visual foxpro 9\ffc\_base.vcx
>File d:\...\microsoft visual foxpro 9\ffc\_base.vcx is in use and cannot be recompiled.
>

>
>I have to CLEAR ALL and RELEASE ALL (no need for close all as it closes the project too). Also if I just ignore the error and recomplie second time class is closed and no error happens.
>
>AT