# Fatal error : The residues in the chain THR9--SER663 do not have a consistent type

**URL:** <https://gromacs.bioexcel.eu/t/fatal-error-the-residues-in-the-chain-thr9-ser663-do-not-have-a-consistent-type/5917>\
**Category:** User discussions\
**Tags:** mdrun\
**Created:** [March 3, 2023, 6:15pm UTC](https://gromacs.bioexcel.eu/t/fatal-error-the-residues-in-the-chain-thr9-ser663-do-not-have-a-consistent-type/5917 "2023-03-03T18:15:54Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Soumava](https://avatars.discourse-cdn.com/v4/letter/s/da6949/32.png) [@Soumava](https://gromacs.bioexcel.eu/u/Soumava)\
**Post date:** [March 3, 2023, 6:15pm UTC](https://gromacs.bioexcel.eu/t/fatal-error-the-residues-in-the-chain-thr9-ser663-do-not-have-a-consistent-type/5917/1 "2023-03-03T18:15:54Z")

</div>

GROMACS version:  
GROMACS modification: Yes/No  
Here post your question  
How can I resolve this?

The residues in the chain THR9–SER663 do not have a consistent type. The  
first residue has type ‘Protein’, while residue SEP257 is of type ‘Other’.  
Either there is a mistake in your chain, or it includes nonstandard residue  
names that have not yet been added to the residuetypes.dat file in the GROMACS  
library directory. If there are other molecules such as ligands, they should  
not have the same chain ID as the adjacent protein chain since it’s a separate  
molecule.

Can you help me with this??

---

<div class="post-metadata">

**Author:** ![jalemkul](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/jalemkul/32/18_2.png) [@jalemkul](https://gromacs.bioexcel.eu/u/jalemkul)\
**Post date:** [March 3, 2023, 8:01pm UTC](https://gromacs.bioexcel.eu/t/fatal-error-the-residues-in-the-chain-thr9-ser663-do-not-have-a-consistent-type/5917/2 "2023-03-03T20:01:59Z")

</div>

Anything nonstandard that you want to incorporate into a chain needs to be defined in `residuetypes.dat`, in your case “SEP” as a protein residue.

---

<div class="post-metadata">

**Author:** ![Rickyy\_maybe](https://avatars.discourse-cdn.com/v4/letter/r/b5a626/32.png) [@Rickyy\_maybe](https://gromacs.bioexcel.eu/u/Rickyy_maybe)\
**Post date:** [March 11, 2023, 11:43am UTC](https://gromacs.bioexcel.eu/t/fatal-error-the-residues-in-the-chain-thr9-ser663-do-not-have-a-consistent-type/5917/3 "2023-03-11T11:43:30Z")

</div>

Fatal error:  
Atom CG in residue VAL 3 was not found in rtp entry VAL with 16 atoms  
while sorting atoms.

Hi, I`m also struggling with that kinda issue can you help me please?

---

<div class="post-metadata">

**Author:** ![Elahe](https://avatars.discourse-cdn.com/v4/letter/e/e68b1a/32.png) [@Elahe](https://gromacs.bioexcel.eu/u/Elahe)\
**Post date:** [September 24, 2024, 10:09am UTC](https://gromacs.bioexcel.eu/t/fatal-error-the-residues-in-the-chain-thr9-ser663-do-not-have-a-consistent-type/5917/4 "2024-09-24T10:09:05Z")

</div>

Dear @Soumava  
Have you solved this problem? If so, I’m facing a similar situation. Can you please help me?