Dan,
I had UCCNC windowed, there was never anything behind main program (I looked - often)
Never knew that that CALL STARTUP was needed, as I was getting the appropriate prompts.
Even though it was in your documentation: 3. Locate HYPLUGIN8 and check boxes "Call startup" and "Enabled".
As a double check, I loaded the 8.1 DLL.
I am pleased to report that the SPINDLE is rotating under your VFD driver!!!!!
Dan, the 911 part of your name is so true.
So it was a PEBKAC (Problem Exists Between Keyboard And Chair) error.
Gordon.