# GROMACS\_ERROR\_U-B\_type

**URL:** <https://gromacs.bioexcel.eu/t/gromacs-error-u-b-type/6588>\
**Category:** User discussions\
**Created:** [June 10, 2023, 4:46am UTC](https://gromacs.bioexcel.eu/t/gromacs-error-u-b-type/6588 "2023-06-10T04:46:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Monalishasarma](https://avatars.discourse-cdn.com/v4/letter/m/e79b87/32.png) [@Monalishasarma](https://gromacs.bioexcel.eu/u/Monalishasarma)\
**Post date:** [June 10, 2023, 4:46am UTC](https://gromacs.bioexcel.eu/t/gromacs-error-u-b-type/6588/1 "2023-06-10T04:46:20Z")

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GROMACS version:  
GROMACS modification: Yes/No  
I have a query regarding to solve the U-B type errors I am facing during the addition of ions to the system. Here I have attached the snapshot of the errors generated. Please kindly find it and help me with the same.

 ![Gromacs_Error](https://europe1.discourse-cdn.com/flex017/uploads/bioexcel1/original/2X/0/0644c7f5a98502806e14964e44616722e18f8e73.png)