Failed to load workflow.

Really frustrating error because it gives you absolutely nothing to go on. I do want to mention that I also tried building a brand new workflow and selecting one of these custom workflow activities and the behavior was odd. If i tried to add one as an ACTION inside my workflow designer, nothing would happen. No error, but the activity wasn’t added to the step either. It was as if my click/selection had no effect.

So I made the decision to completely remove and reinstall the custom activities. The codeplex solution comes nicely packaged using the SharePoint Installer, so all I had to do was run a remove and then a reinstall. Normally, a final step to getting this working according to the InstallGuide.txt is to:

Go to Central Administration -> Application Management -> Manage Web Application Features and activate the feature for desired web applications (usually it’s Sharepoint – 80 or Sharepoint – 443).

The odd thing was that I found this step was already done for me and the solution was listed as already deployed. So back to SharePoint Designer I went, double clicked on the .xoml file, damn, same error! I found several blog posts indicating that I should clear the SharePoint Designer cache. So I closed down SD, deleted the folders starting with 12.x.x.x and loaded SD back up. I tried to open my xoml file, still no luck, same error.

At this point I was getting pretty confused. I manually did a check of the Assembly to make sure it contained the DP.SharePoint.Workflow dll, I double checked the Features folder to make sure it contained the DP.SharePoint.Workflow folder and I make sure the .ACTIONS file was contained within the Workflow folder and that the permissions on it were not wonky. I also verified the web.config contained the safe control entries for that dll. All looked good to me.

FINALLY, I decided to compare my web.config against the old server’s web.config to make sure that I wasn’t missing anything. I did a quick search on DP and found that the old web.config contained one more entry than my new web.config did:

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<authorizedType Assembly="DP.Sharepoint.Workflow, Version=1.0.0.0, Culture=neutral, PublicKeyToken=0298457208daed83" Namespace="DP.Sharepoint.Workflow" TypeName="*" Authorized="True" />

So it would appear that I was missing this authorized type necessary for custom workflow activities. How or why this did not get added when I did my reinstall, I have no idea. But once that entry was added back, I was good to go again. My workflows open just fine without error.

I hope this helps someone else out there!

List Item Not Found

For this particular scenario, here was my setup:

1. I have two lists: Survey and Customers
2. Survey has a custom column called Customer that is of type Lookup. This column is configured to lookup on the Title column in Customers
3. My custom SD workflow has a single activity, the Update List Item activity, configured to update the Customers list, on the Survey Status column, and the criteria for determining what item to update is based on the Customer lookup in the Survey list

Pretty straight forward stuff. I’ve done this a thousand times before and it’s worked without issue. However, I ran into a specific list where the workflow would error every single time, with the List Item Not Found message. Unfortunately, it’s very difficult to get any information other than what’s in the workflow history log. I attempted to read through the operations logs as well, but the information wasn’t really too helpful.

Doing some basic troubleshooting by adding an email activity and outputting the lookup variables in the body helped me determine that the Customer column in the Survey list was returning a blank value. That’s strange. Adding, editing and displaying items in the Customer list gives me no issue, I can select customers from my lookup and they read just fine. So why the heck does my workflow not properly record this value?

It gets a bit more puzzling when I grant myself Site Collection Administrator access to my site. Now all of a sudden, the workflow works and the lookup executes without issue. My entry in the Customers list is updated, all is happy for once. But granting users Site Collection Administration access is not a viable solution. It’s actually pretty crazy, so that’s not going to happen.

So after much frustration, I am sorry to report I don’t have much new information. What I did attempt to do however, was build my own version of the Update List Item activity in Visual Studio 2008. That turned out to be relatively straight forward. I used a bit of reflector to get the bits that I needed to successfully write this. That gave me the debugging capabilities that I desperately needed.

What I was now able to see with my custom activity was that the ListItem property was returning -1, and thus the GetItemById call on the Customers list was unable to find the item. Now why in the world was it returning -1? I’m still puzzled by this, and I’m not 100% sure if this is indeed a permissions related problem or if it’s something a entirely different.

I’m opening this up to anyone out there who might have some information regarding this particular issue. In the end, I wrote a custom Visual Studio sequential workflow, with literally 5 or so lines of code that essentially does the update for me and that runs without issue. I didn’t want to have to do that, but it was the only option I was left with for this particular list.

If anyone has any info, please drop me a line @ shereen at qumsieh dot ca. I would LOVE to get to the bottom of this.

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sendEmail1.Body += "<font face=\"Arial\">This is the body of my email.<br/><br/>";
sendEmail1.Body += "Adding some information for users that will describe some detail about this item.</font>";

The above worked well until I started to see some truncating in my emails. I did some comparisons and found that the truncating would occur when the character count exceeded 2048 characters. I figured this couldn’t be the limit for a string in .NET so I did a bit of digging around and finally discovered that the root of the issue was because I didn’t have any line breaks in my string: “\r\n”. Once I inserted those at specific intervals, the truncating disappeared.

Awesome! Hope this helps someone else out there.

So in my scenario, I had a single workflow tied to a Content Type, and because I knew there was only one workflow, I used index at 0 to get the current workflow association. If your workflow is tied to a list, then you may not need to call ContentType, you might be able to use:

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SPWorkflowAssociation workflowAssociation = workflowProperties.List.WorkflowAssocations[0];

If you have multiple workflows tied to a Content Type or a List, you will need to grab the Guid associationId for that workflow instead of using the index.

Finally, once I have my workflow association configured, I can start my workflow by passing it the parameters it needs:

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if (workflowProperties.Site.WorkflowManager.GetItemActiveWorkflows(setLeaderItem).Count == 0)
{
    SPWorkflowAssociation workflowAssociation = workflowProperties.Item.ContentType.WorkflowAssociations[0];
    workflowProperties.Site.WorkflowManager.StartWorkflow(setLeaderItem, workflowAssociation, workflowAssociation.AssociationData, true);
}

The IF block is there to check if any active workflow are running on that list item. If there aren’t, it attempts to start the workflow. There you have it! That should trigger the workflow on the list item you specified.

What I usually do is create an SPUser object and then use the Name property to get at the display name of the user. Once I’ve got an SPUser object created, I have access to several different properties and methods. You can view the full list on msdn. The SiteUsers property will take in a string containing the login name of the user

SPUser user = workflowProperties.web.SiteUsers[string loginName];
string fullName = user.Name;