I have a decision activity and using the core service I want to finish the current activity, assign the next person and the next activity. This is working fine for a manual activity where I only need to assign the person.

However, the decision activity also requires the next activity to perform and I don't know how to set it. Here is my error: "The next Workflow Activity has not been selected." Any ideas?

Here is my code so far:

using (SessionAwareCoreServiceClient client = new SessionAwareCoreServiceClient(binding))
    // Get Component
    var wfItem = client.Read(componentUri, new ReadOptions()) as ComponentData;
    if (wfItem == null)

    // Get Workflow info for Component
    var activityUri = wfItem.WorkflowInfo.ActivityInstance.IdRef;
    var activityTitle = wfItem.WorkflowInfo.ActivityInstance.Title;

    // Set Finish Message
    ActivityFinishData finishData = new ActivityFinishData();
    finishData.Message = finishMessage;

    // Set Previous performer
    LinkToTrusteeData guiltyPerson = new LinkToTrusteeData();
    TridionHelper tridionHelper = new TridionHelper();
    guiltyPerson.IdRef = tridionHelper.GetPreviousAssigneeUri(componentUri, activityUri, activityTitle);
    finishData.NextAssignee = guiltyPerson;

    // Finish
    client.FinishActivity(activityUri, finishData, new ReadOptions());
  • 2
    You need to use the DecisionActivityFinishData. Take a look at this : stackoverflow.com/q/11537828/1269175
    – Ram G
    Commented Jul 30, 2013 at 13:11
  • Thanks very much for the suggestion - exactly what I was hoping for. Maybe you should put this as an answer, even if it is answered elsewhere?
    – robrtc
    Commented Jul 30, 2013 at 13:18

1 Answer 1


Posting answer from Frank here for community users convenience.

You need to use DecisionActivityFinishData instead of of ActivityFinishData.

var decisionActivityFinishData = new DecisionActivityFinishData
  NextActivity = new LinkToActivityDefinitionData{IdRef = "next activity ID"}
csClient.FinishActivity(currentactivity.Id, decisionActivityFinishData, 

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