Failed to join LAN session: Can't find map file

Development Programming & Scripting Multiplayer & Networking
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1

Trying to join found session but getting this error:

LogLinker:Warning: Can’t find file ‘/Game/Maps/UEDPIE_0_UFOTests’ (name of our map is UFOTests in /Content/Maps/)

Output Log: LogBlueprintUserMessages: [VRTable_GameInfoInstance_C_0] Server: Find and join s - Pastebin.com

We have DefaultPlatformService=Null in DefaultEngine.ini

Thats how we host:

137116-unrealtroublebeginplay.png
137116-unrealtroublebeginplay.png944×428 63.1 KB

137117-unrealtroublehost.png
137117-unrealtroublehost.png1372×395 117 KB

Thats how we connect:

137115-unrealtrouble.png
137115-unrealtrouble.png1285×482 113 KB

HLP, please!

2

The actual problem was that we were not able to test Multiplayer+VR in Editor (Preview in VR) (on 2 machines in same LAN network) because client wasnt able to find map file on server (it was searching for map name with prefix “UEDPIE_0_”). But server was providing map file without this prefix (prefixes are possibly made to test multiplayer in editor with multiple windows).

Solution:

  1. Change Unreal Engine source code (check this link on how to do this) :
    In UnrealEngine.cpp near line 10125 comment the line:

    //NewWorld->RenameToPIEWorld(WorldContext.PIEInstance);

  2. Then build your custom Unreal Engine build

  3. Launch your game server (in editor Preview in VR) with this build (clients can use official Unreal Engine builds).