UE 4.20 - Unable to expand variable in '$(DXSDK_DIR)\Lib\x64

Question

Hello i was trying to use WWise on my Unreal Engine 4 project but when i added the plugin into my project i was given the error "Unable to expand variable in '$(DXSDK_DIR)\Lib\x64". After digging around a bit i noticed that i didn't have the DXSDK_DIR Environment Variable. I created it on both system and user and i pointed to "C:\Program Files\Epic Games\UE_4.20\Engine\Source\ThirdParty\Windows\DirectX" and i still have the same error. If i replace $(DXSDK_DIR) with the hardcoded path or with Environment.GetEnvironmentVariable("DXSDK_DIR", EnvironmentVariableTarget.Machine) it works, so why isn't he recognizing $(DXSDK_DIR)?

Answer 1

Hello.
I also suffered from the same problem, but since I got settled, I will share the information.

Since there is an answer that is helpful in ANSWERHUB of UE 4, we have found this and resolved it.
↓ That site.
https://answers.unrealengine.com/questions/816524/420-directx-compilation-error.html

I hope this information will be of your help.