# Grompp complains of net charge, but itps add up to zero

**URL:** <https://gromacs.bioexcel.eu/t/grompp-complains-of-net-charge-but-itps-add-up-to-zero/561>\
**Category:** User discussions\
**Created:** [July 23, 2020, 5:21pm UTC](https://gromacs.bioexcel.eu/t/grompp-complains-of-net-charge-but-itps-add-up-to-zero/561 "2020-07-23T17:21:24Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![jdandrade](https://avatars.discourse-cdn.com/v4/letter/j/848f3c/32.png) [@jdandrade](https://gromacs.bioexcel.eu/u/jdandrade)\
**Post date:** [July 30, 2020, 11:14pm UTC](https://gromacs.bioexcel.eu/t/grompp-complains-of-net-charge-but-itps-add-up-to-zero/561/9 "2020-07-30T23:14:48Z")

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Thanks, jalemkul. We tried today the testing suggestion from user Dr\_DBW on the other topic ([Gmx grompp complains about net charge but itps add up to zero](https://gromacs.bioexcel.eu/t/gmx-grompp-complains-about-net-charge-but-itps-add-up-to-zero/576)) and it proves that this is indeed the cause for the “oddity” observed.

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