# Editor crash on re-importing mesh with different Material IDs

**URL:** <https://forums.unrealengine.com/t/editor-crash-on-re-importing-mesh-with-different-material-ids/384074>\
**Category:** Asset Creation\
**Tags:** reimport, unreal-engine, crash, bug-report, question\
**Created:** [February 6, 2017, 1:20pm UTC](https://forums.unrealengine.com/t/editor-crash-on-re-importing-mesh-with-different-material-ids/384074 "2017-02-06T13:20:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Leemon\_89](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Leemon\_89](https://forums.unrealengine.com/u/Leemon_89)\
**Post date:** [February 6, 2017, 1:20pm UTC](https://forums.unrealengine.com/t/editor-crash-on-re-importing-mesh-with-different-material-ids/384074/1 "2017-02-06T13:20:27Z")

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Editor crash on re-importing mesh with different material IDs quantity.

Steps to reproduce:

- create and export any static mesh without material applied
- import it to the Editor
- manually add material slot in Mesh editor in UE4 (double-click on it in Content Browser)
- re-import same mesh via Righ click → Reimport

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**Author:** ![anonymous\_user\_0c62419a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0c62419a](https://forums.unrealengine.com/u/anonymous_user_0c62419a)\
**Post date:** [February 6, 2017, 7:54pm UTC](https://forums.unrealengine.com/t/editor-crash-on-re-importing-mesh-with-different-material-ids/384074/2 "2017-02-06T19:54:35Z")

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Hey ChiliLime,

This is a known issue that we have already fixed for 4.15. You will find the public JIRA here: [Unreal Engine Issues and Bug Tracker (UE-40510)](https://issues.unrealengine.com/issue/UE-40510)

Try testing this in the 4.15 preview and the issue should be resolved.

Cheers,

Ed