VOTCA xtp_map "atom entry is not well formatted"

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Xixian

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Feb 5, 2025, 12:49:19 PMFeb 5
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Hello,

I’m now using VOTCA XTP for calculating charge mobility. I’m stuck on the first mapping step. When I run xtp_map, it reminds me that “Atom entry 1:BDF:C1 is not well formatted” as the attached screenshot shows.

To make my issue clearer, I’m using VOTCA version 2024.2 and GROMACS 2019.6. Additionally, I have the screenshot of part of my pdb file,.top file and and .xml file attached.

I tried one molecule in the simulation box and tested the mapping files. This molecule can be further divided into 14 segments. In this one molecule, I have three types of residues and residue number spanning from 1 to 14 (12 of them have the same residue name but different residue number). I also have atom number and residue name (3 different names) defined for the whole molecule. Correspondingly, I have .top file where the atom number, atom name, residue name and residue number that are exactly same as those in .pdb file. Later on together with mdp file, I have my tpr file and xtc file prepared.

For xml file, I composed that manually. I tried the residue number both start from 0 and 1 (since I see some other posts whose atom index starts from 1 in pdb but xml with 0), neither of them works and both gives me the “not well formatted” error. I also tried the <qmatoms> index from either 0 or 1. I guess I might misunderstand anything here. I don’t have any ideas now to address0 this issue. I’m wondering if anyone in this community could help with this issue. Thanks.

Screenshot pdb file.png
Screenshot - Atom entry is not well defined.png
Screenshot - top file Atoms part.png
Screenshot xml file.png

Jens Wehner

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Mar 25, 2025, 4:46:33 PMMar 25
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Hello, 

it is a long time that I used votca, but from what I can gather the problem is your naming of mdatoms , namely the last part of it  1:BDF:C1, it should be something like 1:C1:0 where the last entry is an atom index.

Cheers Jens

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