Exception occurred: Object reference not set to an instance of an object

System.NullReferenceException: Object reference not set to an instance of an object

Server stack trace: 
  at MonoDevelop.Ide.Gui.ProgressMonitorManager.GetOutputProgressMonitor (System.String title, System.String icon, Boolean bringToFront, Boolean allowMonitorReuse) [0x00000] 
  at MonoDevelop.Ide.Gui.ProgressMonitorManager.GetBuildProgressMonitor () [0x00000] 
  at <0x00000> <unknown method>
  at (wrapper managed-to-native) System.Runtime.Remoting.RemotingServices:InternalExecute (System.Reflection.MethodBase,object,object[],object[]&)
  at System.Runtime.Remoting.RemotingServices.InternalExecuteMessage (System.MarshalByRefObject target, IMethodCallMessage reqMsg) [0x00000] 

Exception rethrown at [0]: 

  at MonoDevelop.Ide.Gui.ProgressMonitorManager.GetOutputProgressMonitor (System.String title, System.String icon, Boolean bringToFront, Boolean allowMonitorReuse) [0x00000] 
  at MonoDevelop.Ide.Gui.ProgressMonitorManager.GetBuildProgressMonitor () [0x00000] 
  at <0x00000> <unknown method>
  at (wrapper managed-to-native) System.Runtime.Remoting.RemotingServices:InternalExecute (System.Reflection.MethodBase,object,object[],object[]&)
  at System.Runtime.Remoting.RemotingServices.InternalExecuteMessage (System.MarshalByRefObject target, IMethodCallMessage reqMsg) [0x00000]