Hi

We are trying to create a workflow which can mark all checkboxes on a checkboxlist in the workflow state "When the form has been Opened".

You can not use a workflow with a setting on "When the form has been Opened" state.

This is the simple test workflow:

namespace Upac.CampaignMonitor.ContourExtensions
{
    using System;
    using System.Collections.Generic;
    using Umbraco.Forms.Core;
    using Umbraco.Forms.Core.Enums;

    public class CheckCheckBoxListWorkflow : WorkflowType
    {
        #region Constructors

        public CheckCheckBoxListWorkflow()
        {
            Name = "Check all checkboxes on a checkboxlist";
            Description = "This workflow will check all checkboxes in a checkboxlist fieldtype.";
            Id = new Guid("1387A641-3143-4dbd-8DEB-CB0430164E01");
        }

        #endregion Constructors

        #region Properties

        [Umbraco.Forms.Core.Attributes.Setting("Test", description = "This is a test", control = "Umbraco.Forms.Core.FieldSetting.TextField")]
        public string Checkboxlist
        {
            get;
            set;
        }

        #endregion Properties

        #region Methods

        public override WorkflowExecutionStatus Execute(Record record, RecordEventArgs e)
        {
            return WorkflowExecutionStatus.Completed;
        }

        public override List<Exception> ValidateSettings()
        {
            return new List<Exception>();
        }

        #endregion Methods
    }
}

When the workflow is attached it will only render previous/next buttons and not the UI of the form. And there is no wizard step in the form. There is no warning or error in the log.

If you preview the form you will get an exception

[NullReferenceException: Object reference not set to an instance of an object.]
   Umbraco.Forms.Data.StringHelper.parseRecordPlaceholders(String value, Record record) in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.Core\Data\StringHelper.cs:110
   Umbraco.Forms.Data.StringHelper.ParsePlaceHolders(HttpContext Context, Record record, String value) in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.Core\Data\StringHelper.cs:148
   Umbraco.Forms.Core.Services.WorkflowService.ExecuteWorkflows(List`1 workflows, RecordEventArgs e) in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.Core\Services\WorkflowService\WorkflowService.cs:136
   Umbraco.Forms.Core.Services.WorkflowServiceApplication.FormService_FormEvent(Object sender, RecordEventArgs e) in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.Core\Services\WorkflowService\WorkflowService.cs:71
   Umbraco.Forms.Core.Services.RecordService.Open() in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.Core\Services\RecordService\RecordService.cs:105
   Umbraco.Forms.UI.Usercontrols.RenderForm.GetCurrentService() in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.UI\Usercontrols\RenderForm.ascx.cs:465
   Umbraco.Forms.UI.Usercontrols.RenderForm.OnInit(EventArgs e) in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.UI\Usercontrols\RenderForm.ascx.cs:263
   System.Web.UI.Control.InitRecursive(Control namingContainer) +333
   System.Web.UI.Control.AddedControl(Control control, Int32 index) +198
   System.Web.UI.ControlCollection.Add(Control child) +80
   Umbraco.Forms.UI.Dialogs.previewFormDialog.OnInit(EventArgs e) in d:\TeamCity\buildAgent\work\e4473b9ec9597356\Umbraco.Forms.UI\Dialogs\previewFormDialog.aspx.cs:38
   System.Web.UI.Control.InitRecursive(Control namingContainer) +333
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +378

If you remove the setting it will work.

Can you please confirm the bug or is it by design not possible to have a workflow with a setting in the "When the form has been Opened" state.