>>>I'm not sure about VFP, but in 2.6 you won't have an error when you call a function in the other APP and this one is no longer in the memory. The call is just ignored. This is extremly tricky. What's even more weird: the APP goes out from memory if you delete or move the APP file on disk! Not really weird if we think a little... :)
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>>I'll try the delete trick and see how it goes. Thanks.
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>I don't see how or what for can it be usefull...

You quoted "the APP goes out from memory if you delete or move the APP file on disk" so this is what I was making reference to. :)