Many thanks to all who replied and specially to Fred Nemecek who gave the following precise solution.
The problem is you created a new vocabulary word but did not define it. Find the file UNCMIL.V00, it is in the load point\i486nt\gpost directory. Add you new word FLOTAP at the bottom of the file, follow this example. PPWORD/FLOTAP,3199 The number in this case is an integer code, the values 3101 through 4099 are unused and can be used for custom words. See what the highest number in the UNCMIL.V00 file is and use the next one.
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