ERROR [ ]: System.NullReferenceException: Object reference not set to an instance of an object
  at OpenSim.Framework.Communications.Cache.AssetCache.AddTextureRequest (IClientAPI userInfo, LLUUID imageID, UInt32 packetNumber, Int32 discard) [0x00000]
  at OpenSim.Region.ClientStack.ClientView.ProcessInPacket (libsecondlife.Packets.Packet Pack) [0x00000]
  at OpenSim.Region.ClientStack.ClientView.ClientLoop () [0x00000]
  at OpenSim.Region.ClientStack.ClientView.AuthUser () [0x00000]
  at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void ()