# Difficulty in editing run.cns

**URL:** <https://ask.bioexcel.eu/t/difficulty-in-editing-run-cns/675>\
**Category:** HADDOCK\
**Created:** [December 12, 2017, 11:51am UTC](https://ask.bioexcel.eu/t/difficulty-in-editing-run-cns/675 "2017-12-12T11:51:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![garima.tanwar](https://avatars.discourse-cdn.com/v4/letter/g/43a26b/32.png) [@garima.tanwar](https://ask.bioexcel.eu/u/garima.tanwar)\
**Post date:** [December 12, 2017, 11:51am UTC](https://ask.bioexcel.eu/t/difficulty-in-editing-run-cns/675/1 "2017-12-12T11:51:54Z")

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In the section: Histidine Patches,  
How to define protonation state of Histidine?

WhatIF webserver is also not working right now…

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**Author:** ![amjjbonvin](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/amjjbonvin/32/23_2.png) [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)\
**Post date:** [December 12, 2017, 1:13pm UTC](https://ask.bioexcel.eu/t/difficulty-in-editing-run-cns/675/2 "2017-12-12T13:13:12Z")

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Try molprobity.

Or simply use our web server…