A problem with Windows Phone build

Error building Player: Exception: Error: method System.Reflection.Assembly System.Reflection.Assembly::GetAssembly(System.Type) doesn’t exist in target framework. It is referenced from Assembly-CSharp.dll at System.Void Pathfinding.AstarData::FindGraphTypes().
Error: method System.Int32 System.Math::DivRem(System.Int32,System.Int32,System.Int32&) doesn’t exist in target framework. It is referenced from Assembly-CSharp.dll at Pathfinding.Int3 Pathfinding.GridGraph::GetNodePosition(System.Int32,System.Int32).
Error: method System.Int32 System.Math::DivRem(System.Int32,System.Int32,System.Int32&) doesn’t exist in target framework. It is referenced from Assembly-CSharp.dll at Pathfinding.GridNode Pathfinding.GridGraph::GetNodeConnection(Pathfinding.GridNode,System.Int32).
Error: method System.Int32 System.Math::DivRem(System.Int32,System.Int32,System.Int32&) doesn’t exist in target framework. It is referenced from Assembly-CSharp.dll at System.Boolean Pathfinding.GridGraph::HasNodeConnection(Pathfinding.GridNode,System.Int32).
Error: method System.Int32 System.Math::DivRem(System.Int32,System.Int32,System.Int32&) doesn’t exist in target framework. It is referenced from Assembly-CSharp.dll at System.Void Pathfinding.GridGraph::SetNodeConnection(Pathfinding.GridNode,System.Int32,System.Boolean).

How can i fix it?

Working on it. See http://arongranberg.com/vanillaforums/discussion/509/unity-4-2-and-windows-8-windows-phone-8#latest

And when solution will be found?

Hey, any news on this error? I´ve looked at the other post but Im not sure, is that post refering to the same error?