My first guess is that this might be some copy-paste issue where a space or - character is interpreted in a non-standard way. Can you try typing the same command? Alternatively, as indicated in the error message, using -v yes should work.
hi…and i just input verbose and the number of threads for npt (gmx mdrun -v -deffnm npt -nt 8)
and the finish date and time is this time exhibited, so maybe a glitch if possible last time.