Edited FirstPersonCharacter BP , crash UE permanently

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

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) . 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

[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