Change version with 4.14.3 on 4.15.1
Running S:/Epic Games/UE_4.15/Engine/Binaries/DotNET/UnrealBuildTool.exe Lineage2UE4 Development Win64 -project="C:/Users/Reiner Lute/Documents/Unreal Projects/Lineage2UE4 4.14/Lineage2UE4.uproject" -editorrecompile -progress -NoHotReloadFromIDE Performing full C++ include scan (building a new target) Creating makefile for Lineage2UE4 (no existing makefile) @progress push 5% ERROR: In C:\Users\Reiner Lute\Documents\Unreal Projects\Lineage2UE4 4.14\Source\Lineage2UE4\Faction\CharacterAI.cpp: #include "BehaviorTree\BehaviorTree.h" contains backslashes ('\'), please use forward slashes ('/') instead.
In the second video of your comment, it appears you did not actually compile the changes after deleting the contents of the file. If you open the solution you should be able to right click on the project name and select the Build option to compile everything. The editor should be able to open after this. If this compile fails, please provide the output errors for additional info. Additionally, if you right click on the .uproject file you should have an option to "Switch Unreal Engine version". You should be able to select this and manually switch the engine version from 4.14 to 4.15.
answered Mar 29 '17 at 07:56 PM
As the error states at the end (I know, they can get pretty gross to read with long paths in them), you are using backslashes instead of forward slashes on a #include. You use forward slashes '/' for paths in #includes.
Go into the CharacterAI.cpp source file in your project and change the following:
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