# Error in Ions Adding Stage

**URL:** <https://gromacs.bioexcel.eu/t/error-in-ions-adding-stage/3902>\
**Category:** User discussions\
**Tags:** mdp-parameters, mdrun\
**Created:** [March 27, 2022, 3:44am UTC](https://gromacs.bioexcel.eu/t/error-in-ions-adding-stage/3902 "2022-03-27T03:44:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Santosh456](https://avatars.discourse-cdn.com/v4/letter/s/a8b319/32.png) [@Santosh456](https://gromacs.bioexcel.eu/u/Santosh456)\
**Post date:** [March 27, 2022, 3:44am UTC](https://gromacs.bioexcel.eu/t/error-in-ions-adding-stage/3902/1 "2022-03-27T03:44:55Z")

</div>

GROMACS version:  
GROMACS modification: Yes/No  
Here post your question  
I have faced in ions adding steps. In this stage following error arises " ERROR 4 [file unk.itp, line 793]:  
No default Proper Dih. types

ERROR 5 [file unk.itp, line 827]:  
No default Proper Dih. types

ERROR 6 [file unk.itp, line 860]:  
No default Proper Dih. types

ERROR 7 [file unk.itp, line 869]:  
No default Proper Dih. types

ERROR 8 [file unk.itp, line 890]:  
No default Proper Dih. types

"  
How to solve this issues?