# SavePackage error: "Unexpected custom version"

**URL:** <https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047>\
**Category:** Platform & Builds\
**Tags:** package, save-level, serialization, unreal-engine, CPP, question\
**Created:** [December 7, 2018, 10:23am UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047 "2018-12-07T10:23:10Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![anonymous\_user\_586fe6d5](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_586fe6d5](https://forums.unrealengine.com/u/anonymous_user_586fe6d5)\
**Post date:** [December 7, 2018, 10:23am UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/1 "2018-12-07T10:23:10Z")

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Hi,

I’ve just upgraded several projects from 4.18 to 4.21.

In one of the projects, I’m calling UPackage::SavePackage and I’m getting this error:

`LogSavePackage: Error: Unexpected custom version “Dev-Editor” found when saving /Game/Maps/BaseLevel. This usually happens when export tagging and final serialization paths differ. Package will not be saved.`

I’ve tried clearing out the cache and intermediate files, re-building, re-saving in editor, but the error is still there.

Could this commit (due for 4.21.2) be related? [https://github.com/EpicGames/UnrealEngine/commit/7379c1bee2c043e8873e1e38dc1e347cd3153986](https://github.com/EpicGames/UnrealEngine/commit/7379c1bee2c043e8873e1e38dc1e347cd3153986)

Does anyone have any ideas on what I could try next? Thanks in advance 🙂

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**Author:** ![Shipyards](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Shipyards](https://forums.unrealengine.com/u/Shipyards)\
**Post date:** [December 14, 2018, 2:55pm UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/2 "2018-12-14T14:55:40Z")

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Bumping this, just encountered the same issue any information would be great.

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**Author:** ![anonymous\_user\_c0f0219b](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_c0f0219b](https://forums.unrealengine.com/u/anonymous_user_c0f0219b)\
**Post date:** [January 2, 2019, 3:39pm UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/3 "2019-01-02T15:39:01Z")

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I’ve also hit this problem when upgrading to 4.21. Any update on this?

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**Author:** ![Fernando\_Rabello](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Fernando\_Rabello](https://forums.unrealengine.com/u/Fernando_Rabello)\
**Post date:** [January 4, 2019, 4:56pm UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/4 "2019-01-04T16:56:31Z")

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Same here: 4.21. The objects for me is related with Niagara.

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**Author:** ![anonymous\_user\_d7e24572](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_d7e24572](https://forums.unrealengine.com/u/anonymous_user_d7e24572)\
**Post date:** [January 13, 2019, 5:10am UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/5 "2019-01-13T05:10:50Z")

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Any Resolutions to this issue? Anyone making any headway?

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<div class="post-metadata">

**Author:** ![anonymous\_user\_586fe6d5](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_586fe6d5](https://forums.unrealengine.com/u/anonymous_user_586fe6d5)\
**Post date:** [January 14, 2019, 10:01am UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/6 "2019-01-14T10:01:23Z")

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Hi FeralBeaver - I’ve not heard anything. I’ve had to downgrade back to 4.18 while I wait for the next point release to see if it fixes this issue.

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<div class="post-metadata">

**Author:** ![anonymous\_user\_d7e24572](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_d7e24572](https://forums.unrealengine.com/u/anonymous_user_d7e24572)\
**Post date:** [January 14, 2019, 3:52pm UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/7 "2019-01-14T15:52:32Z")

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Thanks for the update =)

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**Author:** ![SantaCop](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SantaCop](https://forums.unrealengine.com/u/SantaCop)\
**Post date:** [January 18, 2019, 6:10am UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/8 "2019-01-18T06:10:40Z")

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Same here.

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**Author:** ![Fernando\_Rabello](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Fernando\_Rabello](https://forums.unrealengine.com/u/Fernando_Rabello)\
**Post date:** [January 18, 2019, 5:25pm UTC](https://forums.unrealengine.com/t/savepackage-error-unexpected-custom-version/439047/9 "2019-01-18T17:25:34Z")

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For me its was related with Niagara Assets. I manage to solve selecting the problematic assets and clicking with mouse right button and choosing: “mark dependent compatible assets dirty”. Apparently in this case, the problems is those assets have dependency of some Niagara code which got changed or removed from newer Unreal version and this updates those dependencies. So it fix the problem in my case.