I'm developing using VFP 3.0b on a 486DX66 in WFW 3.11.

Every once in a while, when I start up my app and it first gets to some sort of
"difficult" command (such as retrieving the logged-in user name via an API call
to FOXTOOLS.FLL), I will get a "Mismatched pushjmp/popjmp call" error, which boots
me all the way out of VFP. In fact, I'll have to quit Windows and reboot my system
before it will get past that. Does anyone know what causes that? The error isn't
listed in the VFP errors anywhere nor in Microsoft's knowledge base.

I'm asking primarily because I just changed all my form and object classes to be
able to resize them at runtime, and I now get that error message every time I try to
resize a form.