# Cannot save builddata **URL:** \ **Category:** World Creation\ **Tags:** error, build, unreal-engine, level, question\ **Created:** [February 26, 2018, 6:42pm UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396 "2018-02-26T18:42:43Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![NatAlienos](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@NatAlienos](https://forums.unrealengine.com/u/NatAlienos)\ **Post date:** [February 26, 2018, 6:42pm UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396/1 "2018-02-26T18:42:43Z")
When i built a level, and i tried to save, i got an error - The asset ‘/Game/FirstPersonBP/Maps/level1\_BuiltData’ (level1\_BuiltData.uasset) failed to save. And i don’t know what to do… In message log i got: Asset ‘…/…/…/…/…/…/Users/iNera/Documents/Unreal Projects/MyProject/Content/FirstPersonBP/Maps/level1\_BuiltData.uasset’ cannot be saved as it has only been partially loaded. Please help. Sorry for my English but i am from Poland ---
**Author:** ![cmarston74](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@cmarston74](https://forums.unrealengine.com/u/cmarston74)\ **Post date:** [February 26, 2018, 7:58pm UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396/2 "2018-02-26T19:58:20Z")
I could easily be wrong on this one but the only time I have seen this is when I’ve had multiple copies of the same project open. Unreal will allow you to open the same project twice. Because the other open editor is holding references to the same assets, then first editor can’t save it’s data. And will report this when it tries to save. ---
**Author:** ![anonymous\_user\_71723dc4](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_71723dc4](https://forums.unrealengine.com/u/anonymous_user_71723dc4)\ **Post date:** [June 2, 2018, 4:18am UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396/3 "2018-06-02T04:18:23Z")
So I am having the same issue (modded github source engine) but I would swear I only have one instance running. This is so frustrating it’s brought my progress to a complete halt ---
**Author:** ![SergeyRuss](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@SergeyRuss](https://forums.unrealengine.com/u/SergeyRuss)\ **Post date:** [June 8, 2019, 8:59pm UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396/4 "2019-06-08T20:59:41Z")
as Workaround - I’ve duplicated level ,and was able to rebuild/save it. Delete un-saveble level, after that - renamed duplicated level to orignal level name. No clear understanding what the root cause of save issue. ---
**Author:** ![Homeboy696969](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Homeboy696969](https://forums.unrealengine.com/u/Homeboy696969)\ **Post date:** [May 29, 2024, 1:39am UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396/5 "2024-05-29T01:39:33Z")
Still getting this in 2024… The following assets failed to save correctly: /Game/VRTemplate/Maps/VRTemplateMap\_BuiltData. No second editor running, and no reference to anything that might be causing it. Nice ---
**Author:** ![TB7JUPNCDG](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@TB7JUPNCDG](https://forums.unrealengine.com/u/TB7JUPNCDG)\ **Post date:** [October 27, 2024, 10:03pm UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396/6 "2024-10-27T22:03:25Z")
I had a similar problem when changing from dynamic lights to static lights then back. I resolved manually deleting builtdata file (cause I didn’t need it changing back to dynamic lights) ---
**Author:** ![JstPatrick](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@JstPatrick](https://forums.unrealengine.com/u/JstPatrick)\ **Post date:** [May 6, 2025, 11:41pm UTC](https://forums.unrealengine.com/t/cannot-save-builddata/418396/7 "2025-05-06T23:41:39Z")
Sorry to necro this, but I came across the same issue and got to this post while searching for answers. @SergeyRuss back in 2019 was on to something and led me to find something that hasn’t been mentioned that worked for me. - Instead of duplicating the level and such, just close the project completely and then open up your project’s “Content” folder in your OS’s file browser. Navigate to where you have the level asset saved and check to see if there is already a BuiltData asset there for the map. If so, delete it while the project is closed (only that file, not the map too). If you do it while the project is open it won’t let you delete it and is the same reason the editor fails when trying to save over it, it can’t. Once the asset is deleted reopen the project and build the map again. It should then let you save the BuiltData asset. Again, sorry to necro this. Just hope this helps someone else that might stumble on this some day.