# Atom OT1 in residue ASN 47 was not found in rtp entry ASN with 14 atoms while sorting atoms

**URL:** https://gromacs.bioexcel.eu/t/atom-ot1-in-residue-asn-47-was-not-found-in-rtp-entry-asn-with-14-atoms-while-sorting-atoms/7985
**Category:** User discussions
**Created:** [January 6, 2024, 10:27am UTC](https://gromacs.bioexcel.eu/t/atom-ot1-in-residue-asn-47-was-not-found-in-rtp-entry-asn-with-14-atoms-while-sorting-atoms/7985 "2024-01-06T10:27:08Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![NMDr](https://avatars.discourse-cdn.com/v4/letter/n/dec6dc/32.png) [@NMDr](https://gromacs.bioexcel.eu/u/NMDr)
#### Post date: [January 6, 2024, 10:27am UTC](https://gromacs.bioexcel.eu/t/atom-ot1-in-residue-asn-47-was-not-found-in-rtp-entry-asn-with-14-atoms-while-sorting-atoms/7985/1 "2024-01-06T10:27:08Z")

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GROMACS version: 2019  
GROMACS modification: Yes/No  
Here post your question  
I got the

> Blockquote

Atom OT1 in residue ASN 47 was not found in rtp entry ASN with 14 atoms  
while sorting atoms.

> Blockquote

this error in pdb2gmx . how to solve this . Thanks in advance

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### Author: ![scinikhil](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/scinikhil/32/3483_2.png) [@scinikhil](https://gromacs.bioexcel.eu/u/scinikhil)
#### Post date: [January 7, 2024, 1:51am UTC](https://gromacs.bioexcel.eu/t/atom-ot1-in-residue-asn-47-was-not-found-in-rtp-entry-asn-with-14-atoms-while-sorting-atoms/7985/2 "2024-01-07T01:51:55Z")

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[https://manual.gromacs.org/2021.4/user-guide/run-time-errors.html](https://manual.gromacs.org/2021.4/user-guide/run-time-errors.html)