Return of Reckoning

Try to 'connect' to the game and it fails and the log appears with this:

" Error: System.IO.IOException: The process cannot access the file 'C:\Warhammer Online\Warhammer Online - Age of Reckoning\art3.myp' because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
at WarZoneLib.MYP.B5lsDurUKp7MXnmEEd(Object , FileMode , FileAccess )
at WarZoneLib.MYP..ctor(String fileName, FileAccess access)
at WarZoneLib.MYPManager.Get(MythicPackage archive)
at RoRLauncher.Client.HknXgX8I1CQ3FVY7npS(MythicPackage archive)
at RoRLauncher.Client.Handle(PacketIn packet)
at RoRLauncher.Client.IkaEZ48iD826NFTu0BH(Object )
at RoRLauncher.Client.OnReceive(PacketIn packet)
at RoRLauncher.Client.rSN1Kf8QdDryQ7nW8sU(Object )
at RoRLauncher.Client.YFLZyjs0vm(Object ) "

checked task manager and system processes and theres no sign of it running previous to pressing connect button. Ended all tasks tried again rinse and repeat.. nothing? came out of nowhere game was working fine all week.

did you resolve this issues? having the same problem just now and dunno what to do

could it be the antivirus ?