There are articles on MSDN about this, but they are all for VFP 5 and 3. There were a couple for 6.0 but they said they were fixed in SP 3. See:
MSDN Articles >Help!!
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>I am getting an error message when compiling an exe. The error message is "Mismatched pushjmp/popjmp call". When I click OK on the message I am knocked out of VFP.
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>I am running on VFP SP4.
Marty Smith, CSQE