# Undo add or remove hydrogens clears mol

**URL:** <https://discuss.avogadro.cc/t/undo-add-or-remove-hydrogens-clears-mol/1203>\
**Category:** Development\
**Created:** [February 21, 2009, 1:53pm UTC](https://discuss.avogadro.cc/t/undo-add-or-remove-hydrogens-clears-mol/1203 "2009-02-21T13:53:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![SourceForge\_net](https://discuss.avogadro.cc/letter_avatar_proxy/v4/letter/s/71c47a/32.png) [@SourceForge\_net](https://discuss.avogadro.cc/u/SourceForge_net)\
**Post date:** [February 21, 2009, 1:53pm UTC](https://discuss.avogadro.cc/t/undo-add-or-remove-hydrogens-clears-mol/1203/1 "2009-02-21T13:53:03Z")

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Bugs item #2624046, was opened at 2009-02-21 08:53  
Message generated for change (Tracker Item Submitted) made by Item Submitter  
You can respond by visiting:  
[https://sourceforge.net/tracker/?func=detail&atid=835077&aid=2624046&group\_id=165310](https://sourceforge.net/tracker/?func=detail&atid=835077&aid=2624046&group_id=165310)

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Category: Commands / Extensions  
Group: v 0.9.0  
Status: Open  
Resolution: None  
Priority: 5  
Private: No  
Submitted By: Geoff Hutchison (ghutchis)  
Assigned to: Nobody/Anonymous (nobody)  
Summary: Undo add or remove hydrogens clears mol

Initial Comment:  
If I add or remove hydrogens and then use Undo, I clear all atoms.

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You can respond by visiting:  
[https://sourceforge.net/tracker/?func=detail&atid=835077&aid=2624046&group\_id=165310](https://sourceforge.net/tracker/?func=detail&atid=835077&aid=2624046&group_id=165310)