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room.PlayerList and user.PlayerId Exception Occur

This problem occur client side.
We are developed Card Game by Unity. When ROOM_JOIN is event fire, I am trying to GET room.PlayerList or user.PlayerId (Is it correct way ?). Sometimes exception Occur on Real Android Device.
Second question is OnPlayerList is update when USER_ENTER_ROOM,USER_EXIT_ROOM and USER_COUNT_CHANGE events fire ?

These are exception stacks.

ERROR 1: ArgumentException: Destination array cannot hold the requested elements!

System.Collections.Generic.Dictionary`2[System.Int32,Sfs2X.Entities.User].CopyToCheck (System.Array array, Int32 index)
at System.Collections.Generic.Dictionary`2+ValueCollection[System.Int32,Sfs2X.Entities.User].CopyTo (Sfs2X.Entities.User[] array, Int32 index)
at System.Collections.Generic.List`1[Sfs2X.Entities.User].AddCollection (ICollection`1 collection)
at System.Collections.Generic.List`1[Sfs2X.Entities.User]..ctor (IEnumerable`1 collection)
at Sfs2X.Entities.Managers.SFSUserManager.GetUserList ()
at Sfs2X.Entities.SFSRoom.get_PlayerList ()

ERROR 2: IndexOutOfRangeException: Array index is out of range.

(wrapper stelemref) object:stelemref (object,intptr,object)
at System.Collections.Generic.Dictionary`2[System.Int32,Sfs2X.Entities.User].Do_CopyTo[User,User] (Sfs2X.Entities.User[] array, Int32 index, System.Collections.Generic.Transform`1 transform)
at System.Collections.Generic.Dictionary`2+ValueCollection[System.Int32,Sfs2X.Entities.User].CopyTo (Sfs2X.Entities.User[] array, Int32 index)
at System.Collections.Generic.List`1[Sfs2X.Entities.User].AddCollection (ICollection`1 collection)
at System.Collections.Generic.List`1[Sfs2X.Entities.User]..ctor (IEnumerable`1 collection)
at Sfs2X.Entities.Managers.SFSUserManager.GetUserList ()
at Sfs2X.Entities.SFSRoom.get_PlayerList ()

ERROR 3 : NullReferenceException: Object reference not set to an instance of an object.
Sfs2X.Entities.SFSRoom.get_PlayerList ()

ERROR 4 : NullReferenceException: A null value was found where an object instance was required.
Sfs2X.Entities.SFSRoom.get_PlayerList ()

ERROR 5 : NullReferenceException: Object reference not set to an instance of an object
Sfs2X.Entities.SFSUser.GetPlayerId (Room room)Sfs2X.Entities.SFSUser.get_PlayerId ()

Error Platfrom : Android (I dont know other platforms)
Unity Version : 4.6.9
Smartfox Client Version : 1.5.7.0
Smartfox Server Version : 2.9.2

Thanks for reporting.
The first two may have to do with concurrency and we're looking into it.

ERROR 4,5,6 I am not sure what could cause it and what is the context exactly. They may depend on errors #1, and #2.

In any case we should be able to send you an update in the next days that you can test. Stay tuned.

Please contact us by email at info (at) smartfoxserver (dot) com, so we can send you a pre-release version with the concurrency fix you can test.
Also reference this post, thanks.