Hi,

Sorry for disturbing you! I am trying to generate topology file with the 
program xtp_map. After I inputted the following command, it replies
$ xtp_map -t MD_FILES/npt.tpr -c MD_FILES/PEN0.gro -s mapping.xml -f state.hdf5
==================================================
========   VOTCA (http://www.votca.org)   ========
==================================================

please submit bugs to https://github.com/votca/votca/issues

xtp_map, version 2024-dev gitid: e0a61dbe1 (compiled Feb 13 2023, 20:13:21)

an error occurred:
Error 'tpr' file format of file 'MD_FILES/npt.tpr' cannot be read or written
I am wondering why it replies as this. From the tutorials I got the knowledge 
and input the command as the tutorials guided me. I checked the authority of 
the tpr file, and it looks that there were no problems. So I am wondering how 
to fix this problem.

What's more, I assume that tpr file is not necessary in this command. I think 
that tpr file is the sum of top, gro and mdp file. And I have provided the gro 
file after -c flag, so I guess that only a top file is needed and what shows in 
mdp file is not necessary...?

I sincerely hope that you can reply when you are not busy. With my greatest 
gratitude!


Best regards,
Hengyue Zhang





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