# Edited FirstPersonCharacter BP , crash UE permanently

**URL:** <https://forums.unrealengine.com/t/edited-firstpersoncharacter-bp-crash-ue-permanently/378653>\
**Category:** Blueprint\
**Tags:** unreal-engine, crash, question, Blueprint\
**Created:** [December 8, 2016, 12:03am UTC](https://forums.unrealengine.com/t/edited-firstpersoncharacter-bp-crash-ue-permanently/378653 "2016-12-08T00:03:06Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![CyberAlien](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/cyberalien/32/482195_2.png) [@CyberAlien](https://forums.unrealengine.com/u/CyberAlien)\
**Post date:** [December 8, 2016, 12:03am UTC](https://forums.unrealengine.com/t/edited-firstpersoncharacter-bp-crash-ue-permanently/378653/1 "2016-12-08T00:03:06Z")

</div>

Hello ,  
I have a bug with the ‘FirstPersonCharacter’ BP, whenever i changes, the next time I run the editor, it crashes.  
If I replace My FirtPersonCharacter BP file by the original (Original preset ), will work perfectly.  
A problem with the initialization? Or with the BluePrint system?

My blueprint modification is not huge, and did not include any bugs (adding a childBPClass).

The report of error is not very complete.

Thank you

---

<div class="post-metadata">

**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:** [December 8, 2016, 4:29pm UTC](https://forums.unrealengine.com/t/edited-firstpersoncharacter-bp-crash-ue-permanently/378653/2 "2016-12-08T16:29:51Z")

</div>

Hey CyberAlien-

If you’re getting a crash on load after adding a child actor component, it sounds like you may be experiencing this issue: [Unreal Engine Issues and Bug Tracker (UE-39323)](https://issues.unrealengine.com/issue/UE-39323) . As stated in the report, this is projected to be fixed for 4.15. For the time being I would simply avoid using the child actor component.

Cheers

---

<div class="post-metadata">

**Author:** ![CyberAlien](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/cyberalien/32/482195_2.png) [@CyberAlien](https://forums.unrealengine.com/u/CyberAlien)\
**Post date:** [December 8, 2016, 7:45pm UTC](https://forums.unrealengine.com/t/edited-firstpersoncharacter-bp-crash-ue-permanently/378653/3 "2016-12-08T19:45:21Z")

</div>

[2016.12.08-18.39.01:425][0]LogWindows:Error: === Critical error: ===  
[2016.12.08-18.39.01:425][0]LogWindows:Error:  
[2016.12.08-18.39.01:425][0]LogWindows:Error: Fatal error: [File:D:\Build++UE4+Release-4.14+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\Templates\Casts.cpp] [Line: 11]  
[2016.12.08-18.39.01:425][0]LogWindows:Error: Cast of LinkerPlaceholderExportObject /Game/FirstPersonBP/Blueprints/FirstPersonCharacter.FirstPersonCharacter\_C:PistolRail\_Weapon\_GEN\_VARIABLE.PistolRail\_Weapon\_GEN\_VARIABLE\_PistolRail\_Weapon\_C\_CAT to Actor failed  
[2016.12.08-18.39.01:425][0]LogWindows:Error:  
[2016.12.08-18.39.01:425][0]LogWindows:Error:

It is the same error, I put a video link to my modification.

Thank you for your time .

Do you have a solution for this?  
Or, a solution to circumvent the problem (example, use an external BP to make a weapon, without modification of the SPF BP)?

Thank you.

[Error Video][1][1]: [Séquence 01](https://www.mediafire.com/?2mhvirqd1tqxlra)