>>I think that there is one way to solve it - try to recreate a form by copying controls/code from existing to fresh form, but I'm wondering maybe there is another solution (vfp patch or something)
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>Btw, I tried to recreate form - after I select all and copy, vfp started to make large file in temporary directory and it was the same behaviour as saving form... question is which control makes it crash...

Then apply the reverse elimination process - save the form under a different name. Remove one control from the copy, try it out. If that's not the one, copy again, remove the next... try, loop until found. Or until you get a better idea.

Or, better, just Set Step On somewhere in the beginning of the save process, and see what's going on.