static private void OnFailuresProcessingEvent(object sender, FailuresProcessingEventArgs e)
        {
            FailuresAccessor failuresAccessor = e.GetFailuresAccessor();
            IList <FailureMessageAccessor> failureMessages = failuresAccessor.GetFailureMessages();

            if (failureMessages.Count == 0)
            {
                return;
            }

            foreach (FailureMessageAccessor failure in failureMessages)
            {
                if (failure.GetSeverity() == FailureSeverity.Error)
                {
                    FailureResolutionType type = FailureResolutionType.Invalid;
                    if (failure.HasResolutions() && GetFailureResolutionType(failuresAccessor, failure, ref type))
                    {
                        failure.SetCurrentResolutionType(type);
                        failuresAccessor.ResolveFailure(failure);
                        e.SetProcessingResult(FailureProcessingResult.ProceedWithCommit);
                    }
                }
                if (failure.GetSeverity() == FailureSeverity.Warning)
                {
                    failuresAccessor.DeleteWarning(failure);
                }
            }
        }
        /// <summary>
        /// This is an event handler that responds to a failure according to the current settings
        /// </summary>
        /// <param name="sender">The sending object, i.e. the Revit application</param>
        /// <param name="e">The event arguments</param>
        public void AutoOptionsFailureHandler(Object sender, Autodesk.Revit.DB.Events.FailuresProcessingEventArgs e)
        {
            //don't process if handling is turned off
            if (currentSettings.HandlingActive == false)
            {
                return;
            }

            //update the uiApp reference
            Application RevitApp = sender as Application;

            uiApp = new UIApplication(RevitApp);

            FailuresAccessor fa = e.GetFailuresAccessor();
            //this is the action that will be taken to attempt resolution. Default is to continue the default Revit failure processing
            FailureProcessingResult action = FailureProcessingResult.Continue;

            foreach (FailureMessageAccessor fma in fa.GetFailureMessages())
            {
                AutoFailureHandlingOptions aFOpts = currentSettings.AllFailureOptions
                                                    .Where(x => x.FailureGuid == fma.GetFailureDefinitionId().Guid)
                                                    .FirstOrDefault();

                if (aFOpts != null)
                {
                    //Show the CatchFailures dialog if a failure was caught
                    if (currentSettings.InteractiveModeEnabled)
                    {
                        try
                        {
                            //todo: clone to allow roll-back?
                            FailureCatcherWindow failWin = new FailureCatcherWindow(currentSettings, aFOpts, uiApp);

                            Boolean?result = failWin.ShowDialog();

                            if (result.Value)
                            {
                                //Write changes to the .ini
                                currentSettings.LastUpdate = DateTime.Now;
                                IAutoOptionsRepository settingsRepo = new AutoOptionsConfigFileRepo();
                                settingsRepo.WriteAutoOptions(currentSettings);
                            }
                        }
                        catch (Exception ex)
                        {
                            TaskDialog.Show("ex", ex.Message + "\n" + ex.StackTrace);
                            throw;
                        }
                    }

                    FailureResolutionOption selectedResolution = aFOpts.SelectedResolution;
                    if (selectedResolution is AutoOptionsResolution)
                    {
                        try
                        {
                            switch (((AutoOptionsResolution)selectedResolution).Resolution)
                            {
                            case AutoOptionsResolutionType.NoAction:
                                break;

                            case AutoOptionsResolutionType.DeleteAffected:
                                fa.DeleteElements(fma.GetFailingElementIds().ToList());
                                action = FailureProcessingResult.ProceedWithCommit;
                                break;

                            case AutoOptionsResolutionType.CancelTransaction:
                                //todo: not working, being overwritten?
                                action = FailureProcessingResult.ProceedWithRollBack;
                                e.SetProcessingResult(action);
                                fa.RollBackPendingTransaction();
                                return;

                            case AutoOptionsResolutionType.HideWarning:
                                //todo: check if actually is a warning?
                                fa.DeleteWarning(fma);
                                break;

                            default:
                                break;
                            }
                        }
                        catch (Exception ex)
                        {
                            TaskDialog.Show("Dispatcher", ex.Message + "\n" + ex.Source + "\n" + ex.StackTrace);
                        }
                    }
                    else if (selectedResolution is RevitResolution)
                    {
                        try
                        {
                            FailureResolutionType fRT = ((RevitResolution)selectedResolution).Resolution;

                            if (fma.HasResolutionOfType(fRT))
                            {
                                fma.SetCurrentResolutionType(fRT);
                                fa.ResolveFailure(fma);
                                action = FailureProcessingResult.ProceedWithCommit;
                            }
                            else
                            {
                                TaskDialog.Show("AutoOptions", "The selected automatic resolution \n***" + aFOpts.SelectedResolution.FriendlyCaption + " (" + fRT + ")***\ncan't be used");
                            }
                        }
                        catch (Exception ex)
                        {
                            TaskDialog.Show("Dispatcher", ex.Message + "\n" + ex.Source + "\n" + ex.StackTrace);
                        }
                    }
                }
            }

            e.SetProcessingResult(action);
        }
        static private bool GetFailureResolutionType(FailuresAccessor failuresAccessor, FailureMessageAccessor failure, ref FailureResolutionType type)
        {
            IList <FailureResolutionType> resolutionTypeList = failuresAccessor.GetAttemptedResolutionTypes(failure);

            if (!resolutionTypeList.Contains(FailureResolutionType.Default) && failure.HasResolutionOfType(FailureResolutionType.Default))
            {
                type = FailureResolutionType.Default;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.CreateElements) && failure.HasResolutionOfType(FailureResolutionType.CreateElements))
            {
                type = FailureResolutionType.CreateElements;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.DeleteElements) && failure.HasResolutionOfType(FailureResolutionType.DeleteElements))
            {
                type = FailureResolutionType.DeleteElements;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.SkipElements) && failure.HasResolutionOfType(FailureResolutionType.SkipElements))
            {
                type = FailureResolutionType.SkipElements;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.MoveElements) && failure.HasResolutionOfType(FailureResolutionType.MoveElements))
            {
                type = FailureResolutionType.MoveElements;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.FixElements) && failure.HasResolutionOfType(FailureResolutionType.FixElements))
            {
                type = FailureResolutionType.FixElements;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.DetachElements) && failure.HasResolutionOfType(FailureResolutionType.DetachElements))
            {
                type = FailureResolutionType.DetachElements;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.QuitEditMode) && failure.HasResolutionOfType(FailureResolutionType.QuitEditMode))
            {
                type = FailureResolutionType.QuitEditMode;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.UnlockConstraints) && failure.HasResolutionOfType(FailureResolutionType.UnlockConstraints))
            {
                type = FailureResolutionType.UnlockConstraints;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.SetValue) && failure.HasResolutionOfType(FailureResolutionType.SetValue))
            {
                type = FailureResolutionType.SetValue;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.SaveDocument) && failure.HasResolutionOfType(FailureResolutionType.SaveDocument))
            {
                type = FailureResolutionType.SaveDocument;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.ShowElements) && failure.HasResolutionOfType(FailureResolutionType.ShowElements))
            {
                type = FailureResolutionType.ShowElements;
                return(true);
            }
            else if (!resolutionTypeList.Contains(FailureResolutionType.Others) && failure.HasResolutionOfType(FailureResolutionType.Others))
            {
                type = FailureResolutionType.Others;
                return(true);
            }

            return(false);
        }