This code seems correct.  No matter what I try, I can only get 2 probe moves.  It does the same thing in a loop with only 2 iterations then bombs out.    
The file is opening and 2 lines of x and y position are recorded correctly.  It will not do the third block.  The screen blinks at the end of the second block.
Any code after the second block is skipped so no message etc can be displayed.

Why is it aborting like this?

inst = mc.mcGetInstance()

mc.mcCntlGcodeExecuteWait(inst,"G90G00 X-4.2 Y-.6") --position at beginning at pin setpoint

mc.mcCntlProbeFileOpen(inst, "C:\\mach4Hobby\\GcodeFiles\\KFCProbeValues.csv","%.4AXIS_ %.4AXIS_Y\n", true)

     mc.mcCntlGcodeExecuteWait(inst,"G31 Y-.65 F20.0")
     mc.mcCntlGcodeExecuteWait(inst,"G91G00 X-.1 Y.07")
     mc.mcCntlGcodeExecuteWait(inst,"G90")

     mc.mcCntlGcodeExecuteWait(inst,"G31 Y-.65 F20.0")
     mc.mcCntlGcodeExecuteWait(inst,"G91G00 X-.1 Y.07")
     mc.mcCntlGcodeExecuteWait(inst,"G90")

     mc.mcCntlGcodeExecuteWait(inst,"G31 Y-.65 F20.0")
     mc.mcCntlGcodeExecuteWait(inst,"G91G00 X-.1 Y.07")
     mc.mcCntlGcodeExecuteWait(inst,"G90")


mc.mcCntlProbeFileClose(inst) --close probe file

Working fine now but not sure what I did to fix it!  Probing!!