Error in user input: Invalid command-line INQUIRY

GROMACS version: 2020.3
GROMACS modification: Yes/No
Here post your question:

Hello during the Protein-Ligand nvt equilibration step I had input:

gmx mdrun -v -deffnm nvt -nt 8

to be able to view time completion and am continuously receiving the below error:

Error in user input:
Invalid command-line options
In command-line option -v
Invalid value: ‘deffnm’; supported values are: 1, 0, yes, no, true, false
In command-line option -v
Invalid value: ‘nvt’; supported values are: 1, 0, yes, no, true, false

Is there a way to correct this since I have not had this problem previously?

Thanks:)

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.

Hello cblau and thank you for your kind update and yes i typed this same command in as well with the same resulting errors, other suggestions?

Much Thanks:)
Joel

Yes, trying -v yes or trying --v. What system are you using?

Hell clbau and thank you again for your kind update and I am using gromacs 2020.3 on my macOS Catalina Version 10.15.6

I tried both of your suggestion via paste and input and both output the same error results .

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.

Thanks again:)