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SavePackage error: "Unexpected custom version"


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

Does anyone have any ideas on what I could try next? Thanks in advance :) Marc

Product Version: UE 4.21
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asked Dec 07 '18 at 10:23 AM in C++ Programming

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avatar image Shipyards Dec 14 '18 at 02:55 PM

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

avatar image DaveH Jan 02 '19 at 03:39 PM

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

avatar image Fernando Rabello Jan 04 '19 at 04:56 PM

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

avatar image FeralBeaver Jan 13 '19 at 05:10 AM

Any Resolutions to this issue? Anyone making any headway?

avatar image MarcDouglas Jan 14 '19 at 10:01 AM

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.

avatar image FeralBeaver Jan 14 '19 at 03:52 PM

Thanks for the update =)

avatar image SantaCop Jan 18 '19 at 06:10 AM

Same here.

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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.

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answered Jan 18 '19 at 05:25 PM

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Fernando Rabello
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