Make sure that you've VFP7 SP1 runtime files on those PC's.

>I suddenly started getting error 1309 (file is not an object file) on a client's machine--actually several machines at the client site. I am not getting this error on my machine or on other clients' machines.
>
>In my architecture, the system starts off with an exe. The exe then calls the main .app file. It is when the exe calls the .app file that the error 1309 occurs.
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>However, I first got this error when I installed an updated app that is called by another app. That call also failed with the 1309 error.
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>I tried to correct this problem by rebuilding the exe file and the main app file (both in VFP7 SP1) but the error persists. Does anyone have experience with this problem?
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>VFP6 Help says 1309 indicates an attempt to execute a compiled VFP program that doesn't have a proper header.
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>Is it possible that there's some strange thing at this one client that is causing this problem?
>
>Thanks