# Migrating blueprints from one project ot another makes dead actors

**URL:** <https://forums.unrealengine.com/t/migrating-blueprints-from-one-project-ot-another-makes-dead-actors/351136>\
**Category:** Programming & Scripting\
**Tags:** unreal-engine\
**Created:** [March 20, 2016, 1:27pm UTC](https://forums.unrealengine.com/t/migrating-blueprints-from-one-project-ot-another-makes-dead-actors/351136 "2016-03-20T13:27:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Yata](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Yata](https://forums.unrealengine.com/u/Yata)\
**Post date:** [March 20, 2016, 1:27pm UTC](https://forums.unrealengine.com/t/migrating-blueprints-from-one-project-ot-another-makes-dead-actors/351136/1 "2016-03-20T13:27:42Z")

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Tried to migrate some my blueprints from one project to another. While some blueprints and assets where parented from c++ migration of them failed. It produced blueprints parented from unknown classes, despite c++ classes where copied before, but the have different project API.  
And there is no way to fix parents of those bluerpints

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**Author:** ![anonymous\_user\_2b03d27c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_2b03d27c](https://forums.unrealengine.com/u/anonymous_user_2b03d27c)\
**Post date:** [March 22, 2016, 6:15pm UTC](https://forums.unrealengine.com/t/migrating-blueprints-from-one-project-ot-another-makes-dead-actors/351136/2 "2016-03-22T18:15:40Z")

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Hey -

Trying to migrate custom code / code based blueprints causes reference errors in the blueprint which corrupt it when you try to open. This is a known limitation that we would like to address in a future update to the engine, however there is no timeframe for this functionality at this time.

Cheers

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**Author:** ![Doctor\_Kannon](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/doctor_kannon/32/1130101_2.png) [@Doctor\_Kannon](https://forums.unrealengine.com/u/Doctor_Kannon)\
**Post date:** [May 7, 2020, 3:33am UTC](https://forums.unrealengine.com/t/migrating-blueprints-from-one-project-ot-another-makes-dead-actors/351136/3 "2020-05-07T03:33:51Z")

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This is still an issue.

> **[How to Migrate a Custom Level BP (C++)?](https://forums.unrealengine.com/questions/958293/view.html)**
>
> Hello, I have just migrated a level to a new project. The level BP's parent is a custom level script actor created in C++ (ALevelScriptActor). Custom functions are accessed with BP nodes. The new code compiles, but the new level BP complains that...

- [Unreal Engine Issues and Bug Tracker (UE-21307)](https://issues.unrealengine.com/issue/UE-21307)
- [Unreal Engine Issues and Bug Tracker (UE-28639)](https://issues.unrealengine.com/issue/UE-28639)