Dedicated server tries to load UMG assets

Hi,

When launching a dedicated server it tries to load (and fails to) UMG assets. Since it is a server it should not.
The errors don’t make the game crash but it is quite strange for me

I migrated my project from 4.5 to 4.6 and compiled from code yesterday. Maybe the error was occuring before but I never noticed…

[2015.01.20-14.09.54:747][  0]LogSlate:Warning: Failed to load font data from '../../../Engine/Content/Slate/Fonts/Roboto-Italic.ttf'
[2015.01.20-14.09.55:280][  0]LogLinker:Warning: Can't find file '/Script/UMG'
[2015.01.20-14.09.55:280][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:280][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file '/Script/UMG'
[2015.01.20-14.09.55:281][  0]LogLinker:Warning: Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:281][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:281][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:282][  0]LogLinker:Warning: Can't find file '/Script/UMG'
[2015.01.20-14.09.55:282][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:282][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file '/Script/UMG'
[2015.01.20-14.09.55:282][  0]LogLinker:Warning: Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:283][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:283][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:283][  0]LogLinker:Warning: CreateExport: Failed to load Outer for resource 'CallFunc_Add_IntInt_ReturnValue': WidgetBlueprintGeneratedClas
s /Game/Blueprints/Widgets/PirateUI.PirateUI_C
[2015.01.20-14.09.55:284][  0]LogLinker:Warning: Can't find file '/Script/UMG'
[2015.01.20-14.09.55:284][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:285][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file '/Script/UMG'
[2015.01.20-14.09.55:285][  0]LogLinker:Warning: Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:285][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:286][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:286][  0]LogLinker:Warning: Can't find file '/Script/UMG'
[2015.01.20-14.09.55:286][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:286][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file '/Script/UMG'
[2015.01.20-14.09.55:287][  0]LogLinker:Warning: Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:287][  0]LoadErrors: Info Failed to load /Game/Blueprints/Widgets/PirateUI.PirateUI_C Referenced by CallFunc_Create_ReturnValue
[2015.01.20-14.09.55:287][  0]LogUObjectGlobals:Warning: Failed to load '/Script/UMG': Can't find file for asset '/Script/UMG' while loading NULL.
[2015.01.20-14.09.55:287][  0]LogLinker:Warning: CreateExport: Failed to load Outer for resource 'CallFunc_LessEqual_IntInt_ReturnValue': WidgetBlueprintGenerat
edClass /Game/Blueprints/Widgets/PirateUI.PirateUI_C

Do you have any idea about this ?

Thanks
Jnat