# Invalid or uninitialized OnlineSubsystem

**URL:** <https://forums.unrealengine.com/t/invalid-or-uninitialized-onlinesubsystem/306866>\
**Category:** Blueprint\
**Tags:** onlinesubsystem, unreal-engine, Blueprint, question\
**Created:** [February 13, 2015, 5:14pm UTC](https://forums.unrealengine.com/t/invalid-or-uninitialized-onlinesubsystem/306866 "2015-02-13T17:14:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Zakkar](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Zakkar](https://forums.unrealengine.com/u/Zakkar)\
**Post date:** [February 13, 2015, 5:14pm UTC](https://forums.unrealengine.com/t/invalid-or-uninitialized-onlinesubsystem/306866/1 "2015-02-13T17:14:21Z")

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Hi everybody i’m trying to make an online system for my game based on a lobby where people can join each other and play the game, but when i do “Find Session” or “Create Session” there is an error log message

LogScript:Warning: FindSessions - Invalid or uninitialized OnlineSubsystem  
LogScript:Warning: FindSessions - Cannot map local player to unique net ID

While i had added  
PublicDependencyModuleNames.AddRange(new string[] { “Core”, “CoreUObject”, “Engine”, “OnlineSubsystem” }); into my build.cs file game  
and also  
[OnlineSubsystem]  
DefaultPlatformService=LAN into my DafaultEngine.ini

Can someone knew how to fix that ?  
Here’s a part if my bluprint

 ![29902-bl_session.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/1/c/51c3cdc2dad96b7535e695584c931a102c5e96e5.png)

Thank you

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**Author:** ![Muzaheed](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/muzaheed/32/778940_2.png) [@Muzaheed](https://forums.unrealengine.com/u/Muzaheed)\
**Post date:** [March 20, 2015, 6:16am UTC](https://forums.unrealengine.com/t/invalid-or-uninitialized-onlinesubsystem/306866/2 "2015-03-20T06:16:04Z")

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did u find any solution of this?

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<div class="post-metadata">

**Author:** ![Zakkar](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Zakkar](https://forums.unrealengine.com/u/Zakkar)\
**Post date:** [March 20, 2015, 3:35pm UTC](https://forums.unrealengine.com/t/invalid-or-uninitialized-onlinesubsystem/306866/3 "2015-03-20T15:35:29Z")

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I don’t remeber well but, for the onlineSubsystem i remplaced it by, OnlineSubsystemNull, same in the DefaultEngine.ini DefaultPlatformService=Null and it worked

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**Author:** ![anonymous\_user\_82b794a0](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_82b794a0](https://forums.unrealengine.com/u/anonymous_user_82b794a0)\
**Post date:** [April 8, 2016, 2:33pm UTC](https://forums.unrealengine.com/t/invalid-or-uninitialized-onlinesubsystem/306866/4 "2016-04-08T14:33:16Z")

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Thank you !!!