Level not loading

I have a Menu with many Levels to load. Exact one Level does not load correctly and returns to the MainMenu Level. I cannot see anything in the Log why the Level does not load correctly.

Log of a Level that loads correctly:

LogPackageName: SearchForPackageOnDisk took   1.596s to resolve WaterTest.umap
LogContentStreaming: Blocking on texture streaming: 0.1 ms (0 textures updated, 0 still pending)
LogPackageName: SearchForPackageOnDisk took   0.082s to resolve WaterTest.umap
LogNet: Browse: /Game/Maps/WaterTest??game=/Game/Gameplay/BP_GameMode_Game_Coins.BP_GameMode_Game_Coins_C
LogLoad: LoadMap: /Game/Maps/WaterTest??game=/Game/Gameplay/BP_GameMode_Game_Coins.BP_GameMode_Game_Coins_C
LogParticles: Destroying 0 GPU particle simulations for FXSystem 0x00000082C7ECDBC0
Cmd: MEM
LogMemory: Platform Memory Stats for Windows
LogMemory: Process Physical Memory: 5909.42 MB used, 6084.36 MB peak
LogMemory: Process Virtual Memory: 7360.58 MB used, 7369.63 MB peak
LogMemory: Physical Memory: 7602.22 MB used, 8131.97 MB total
LogMemory: Virtual Memory: 8537.30 MB used, 134217728.00 MB total
Allocator Stats for TBB: (not implemented)
LogAIModule: Creating AISystem for world WaterTest
LogLinker:Warning: NameProperty_119 has an inappropriate outermost, it was probably saved with a deprecated outer (file: D:/Development/Mathias/Papierboot/GameProject/Paperboat/Content/Gameplay/Level.uasset)
LogWorld: Game class is 'BP_GameMode_Game_Coins_C'
LogWorld: Bringing World /Game/Maps/UEDPIE_0_WaterTest.WaterTest up for play (max tick rate 0) at 2015.06.25-18.19.55
LogActor:Warning: GameSession /Game/Maps/UEDPIE_0_WaterTest.WaterTest:PersistentLevel.GameSession_24 has natively added scene component(s), but none of them were set as the actor's RootComponent - picking one arbitrarily
LogActor:Warning: GameNetworkManager /Game/Maps/UEDPIE_0_WaterTest.WaterTest:PersistentLevel.GameNetworkManager_26 has natively added scene component(s), but none of them were set as the actor's RootComponent - picking one arbitrarily
LogWorld: Bringing up level for play took: 0.012561
LogBlueprintDebug:Warning: Hit breakpoint on node 'K2Node_AddDelegate', from offset 470
LogBlueprintDebug: Script call stack:
    Function /Game/Gameplay/BP_GameMode_Game.BP_GameMode_Game_C:K2_PostLogin
    Function /Game/Gameplay/BP_GameMode_Game.BP_GameMode_Game_C:ExecuteUbergraph_BP_GameMode_Game

Log of the defect Level:

LogPackageName: SearchForPackageOnDisk took   0.063s to resolve Cave_Level_Lighting_014.umap
LogContentStreaming: Blocking on texture streaming: 0.1 ms (0 textures updated, 0 still pending)
LogPackageName: SearchForPackageOnDisk took   0.064s to resolve Cave_Level_Lighting_014.umap
LogNet: Browse: /Game/Maps/Cave/Cave_01/Cave_Level_Lighting_014??game=/Game/Gameplay/BP_GameMode_Game_Coins.BP_GameMode_Game_Coins_C
LogLoad: LoadMap: /Game/Maps/Cave/Cave_01/Cave_Level_Lighting_014??game=/Game/Gameplay/BP_GameMode_Game_Coins.BP_GameMode_Game_Coins_C
LogParticles: Destroying 0 GPU particle simulations for FXSystem 0x00000082C8B22DE0
Cmd: MEM
LogMemory: Platform Memory Stats for Windows
LogMemory: Process Physical Memory: 5911.02 MB used, 6084.36 MB peak
LogMemory: Process Virtual Memory: 7361.13 MB used, 7374.28 MB peak
LogMemory: Physical Memory: 7609.26 MB used, 8131.97 MB total
LogMemory: Virtual Memory: 8537.37 MB used, 134217728.00 MB total
Allocator Stats for TBB: (not implemented)
LogPlayLevel: Creating play world package: /Game/Maps/Cave/Cave_01/UEDPIE_0_Cave_Level_Lighting_014
LogPlayLevel: PIE: StaticDuplicateObject took: (0.007720s)
LogAIModule: Creating AISystem for world MainMenu
LogPlayLevel: PIE: World Init took: (0.002860s)
LogPlayLevel: PIE: Created PIE world by copying editor world from /Game/Maps/MainMenu.MainMenu to /Game/Maps/Cave/Cave_01/UEDPIE_0_Cave_Level_Lighting_014.MainMenu (0.010889s)
LogWorld: Game class is 'BP_GameMode_Game_Coins_C'
LogWorld: Bringing World /Game/Maps/Cave/Cave_01/UEDPIE_0_Cave_Level_Lighting_014.MainMenu up for play (max tick rate 0) at 2015.06.25-18.20.17
LogActor:Warning: GameSession /Game/Maps/Cave/Cave_01/UEDPIE_0_Cave_Level_Lighting_014.MainMenu:PersistentLevel.GameSession_26 has natively added scene component(s), but none of them were set as the actor's RootComponent - picking one arbitrarily
LogActor:Warning: GameNetworkManager /Game/Maps/Cave/Cave_01/UEDPIE_0_Cave_Level_Lighting_014.MainMenu:PersistentLevel.GameNetworkManager_28 has natively added scene component(s), but none of them were set as the actor's RootComponent - picking one arbitrarily
LogWorld: Bringing up level for play took: 0.002181
LogGameMode: Warning - PATHS NOT DEFINED or NO PLAYERSTART with positive rating
LogBlueprintDebug:Warning: Hit breakpoint on node 'K2Node_AddDelegate', from offset 470
LogBlueprintDebug: Script call stack:
    Function /Game/Gameplay/BP_GameMode_Game.BP_GameMode_Game_C:K2_PostLogin
    Function /Game/Gameplay/BP_GameMode_Game.BP_GameMode_Game_C:ExecuteUbergraph_BP_GameMode_Game

The Error seems to occur in this section but there is no error message or warning:

LogPlayLevel: Creating play world package: /Game/Maps/Cave/Cave_01/UEDPIE_0_Cave_Level_Lighting_014
LogPlayLevel: PIE: StaticDuplicateObject took: (0.007720s)
LogAIModule: Creating AISystem for world MainMenu

Does anyone has an idea what the problem can be?

Edit: As a workaround I created a new Level and moved all actors from the old to the new one.

Hi, your level is not cooked so engine does not know where to search for that map and loads the defaul map. To test this compile your game and start freshly compiled game and map can be loaded. I have same problem, so its either to copy over everything to a new map or to compile for iOS and start it on iPad. Have a great day (: