Your reply looked like just the ticket, so logical ....... but
after defining GROFF_TMPDIR and noting that the others you
mentioned in the docs were already defined in places I have no
trouble writing, still no go !!
smay7% pwd
C:/Users/jws/jws.t
smay7% echo $HOME
C:/Users/jws/jws.t
smay7% echo $TMP
C:\Users\jws\AppData\Local\Temp
smay7% echo $TEMP
C:\Users\jws\AppData\Local\Temp
smay7% echo $TMPDIR
C:/Users/jws/AppData/Local/Temp
smay7% echo $GROFF_TMPDIR
C:/Users/jws/AppData/Local/Temp
smay7% fp -s grofftest
C:/Applications/groff/bin/groff: cannot execute: The requested
operation requires elevation.
C:\Applications\groff\bin\eqn:fatal error: output error
Saved grofftest in grofftest.ps