right, apologies. general support makes sense.
I have no mods installed. and in the log files under the text reads this
at DecoObject.Write (System.IO.BinaryWriter _bw, NameIdMapping _blockMap) [0x0004b] in <6d1a8548522e46dc83d70764cc5f4032>:0
at DecoManager.Write (System.IO.BinaryWriter _bw, NameIdMapping _blockMap) [0x00044] in <6d1a8548522e46dc83d70764cc5f4032>:0
at DecoManager.Save () [0x00069] in <6d1a8548522e46dc83d70764cc5f4032>:0
at World.SaveDecorations () [0x00005] in <6d1a8548522e46dc83d70764cc5f4032>:0
at World.Save () [0x000b9] in <6d1a8548522e46dc83d70764cc5f4032>:0
at GameManager.SaveWorld () [0x00008] in <6d1a8548522e46dc83d70764cc5f4032>:0
at GameManager.SaveAndCleanupWorld () [0x000a1] in <6d1a8548522e46dc83d70764cc5f4032>:0
at ConnectionManager.StopServers () [0x00028] in <6d1a8548522e46dc83d70764cc5f4032>:0
at GameManager.Disconnect () [0x0014c] in <6d1a8548522e46dc83d70764cc5f4032>:0
at GameManager+<ApplicationQuitCo>d__183.MoveNext () [0x0003f] in <6d1a8548522e46dc83d70764cc5f4032>:0
and again at another time
at TriggerEffectManager.Update () [0x00032] in <6d1a8548522e46dc83d70764cc5f4032>:0
at GameManager.gmUpdate () [0x0018e] in <6d1a8548522e46dc83d70764cc5f4032>:0
at GameManager.Update () [0x00000] in <6d1a8548522e46dc83d70764cc5f4032>:0