Gmx msd using em.tpr Fatal error: No v in input file

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1

GROMACS version: 2023
GROMACS modification: Yes/No
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Hi,I wanted to have msd and use gmx msd in this command:
gmx msd -f nojump.gro -s em.tpr -o msd.xvg but i encountered with this error:
No v in input file
then i checked the em.tpr file with thies command:
gmx dump -s em.tpr
in this file there was this phrase:
v: not available
I checked the em.tpr file of previous version like 2018, em.tpr included velocity.
It is worth mentioning that I just changed the version of gromacs.
Thanks.

2

Hi! Thanks for reporting!

This appears to be a bug in recent GROMACS versions, which we plan to fix in 2023.2. In the mean time, as a workaround, you can use an older (2021.x) release.

3

Thank you for your reply