Error: Bad packed file

[Slasher]

Anyone got any ideas as to why this now comes up:

Error: Load_Room: Bad packed file. Either the file requires a newer or older version of this program or the file is corrupt

FULL REPORT:

Error: Load_Room: Bad packed file. Either the file requires a newer or older version of
this program or the file is corrupt.

Version: AGS 3.2.1.111

AGS.Types.AGSEditorException: Load_Room: Bad packed file. Either the file requires a newer or older version of
this program or the file is corrupt.

   at ThrowManagedException(SByte* message)
   at load_room_file(SByte* )
   at load_crm_file(UnloadedRoom roomToLoad)
   at AGS.Native.NativeMethods.LoadRoomFile(UnloadedRoom roomToLoad)
   at AGS.Editor.Components.RoomsComponent.LoadNewRoomIntoMemory(UnloadedRoom newRoom, CompileMessages errors)
   at AGS.Editor.Components.RoomsComponent.RecompileAnyRoomsWhereTheScriptHasChanged(CompileMessages errors, Boolean rebuildAll)
   at AGS.Editor.Components.RoomsComponent.AGSEditor_PreCompileGame(PreCompileGameEventArgs evArgs)
   at AGS.Editor.AGSEditor.PreCompileGameHandler.Invoke(PreCompileGameEventArgs evArgs)
   at AGS.Editor.AGSEditor.CompileGame(Boolean forceRebuild, Boolean createMiniExeForDebug)
   at AGS.Editor.Components.BuildCommandsComponent.CompileGame(Boolean forceRebuild)
   at AGS.Editor.Components.BuildCommandsComponent.CommandClick(String controlID)
   at AGS.Editor.ToolBarManager.ToolbarEventHandler(Object sender, EventArgs e)
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripButton.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

AGS 321

I had a backup and had to re-import a room for some reason. It seems to be ok at the moment.

I find this very strange..