Hm, getting an error when opening the "add workflow"-dialog in the backoffice now. Did not happen before. Have unloaded my class from project but error still apears?

[NullReferenceException: Object reference not set to an instance of an object.]
   Umbraco.Forms.Core.Common.ProviderCollection`1.(T , T ) +68
   System.FunctorComparer`1.Compare(T x, T y) +14
   System.Collections.Generic.ArraySortHelper`1.DepthLimitedQuickSort(T[] keys, Int32 left, Int32 right, IComparer`1 comparer, Int32 depthLimit) +226
   System.Collections.Generic.ArraySortHelper`1.Sort(T[] keys, Int32 index, Int32 length, IComparer`1 comparer) +216

[InvalidOperationException: Failed to compare two elements in the array.]
   System.Collections.Generic.ArraySortHelper`1.Sort(T[] keys, Int32 index, Int32 length, IComparer`1 comparer) +286
   System.Array.Sort(T[] array, Int32 index, Int32 length, IComparer`1 comparer) +205
   System.Collections.Generic.List`1.Sort(Comparison`1 comparison) +118
   Umbraco.Forms.Core.Common.ProviderCollection`1.GetProviders() +651
   Umbraco.Forms.UI.Dialogs.editWorkflowDialog.Page_Load(Object sender, EventArgs e) +272
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
   System.Web.UI.Control.OnLoad(EventArgs e) +92
   umbraco.BasePages.BasePage.OnLoad(EventArgs e) +59
   System.Web.UI.Control.LoadRecursive() +54
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772

Hmm could you try touching web.config and see if that resolves it

Hm. Does not solve it. Also restarted IIS (and the actual computer). I have rollbacked all changes, but still no go. It was working last friday! I'm not sure what might have caused it, my best guess right now might be the fact that I removed an experimental workflowitem (one of the built-in ones): Any ideas on how to troubleshoot this? Looking in DB? Refrence issue?

Might have to do with refrences according to this post: http://our.umbraco.org/forum/umbraco-pro/contour/26435-Failed-to-compare-stacktrace-when-adding-workflow-items

But still cant manage to fix it! added and removed refrences multiple times already. Incredibly annoying. Any thoughts appriciated.

Found it. I had completly missed the constructor and setting the name, description etc as stated here: http://our.umbraco.org/projects/umbraco-pro/contour/documentation/Developer/Extending-Contour/Adding-a-Type

I realize this is rather old.. But if it helps anyone I was able to get this working with the following.. This workflow is last, and i'm unclear of the implications of putting it before other workflows since UForms is a bit of a black box, but this gets the job done.

    public override WorkflowExecutionStatus Execute(Record record, RecordEventArgs e)
    {
        //Run your awesome workflow logic, personally I had to find a node

        // This honestly feels hacky, but I found no other out-of-the-box way to do this! Documentation is quite limited, and/or dead links from contour
        HttpContext.Current.Response.Redirect("http://google.com");

        return WorkflowExecutionStatus.Completed;
    }

Cheers

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