Exception handling in the SharePoint Workflow 2013

Question

My workflow is quite long and have a lot of Stages. Stages include stuff like

1. Create new Tasks
2. Send email to a few people.
3. Update some fields in the list.

Most of the times while sending email, workflow stuck there. Then looking at the workflow status it shows the error-

RequestorId: 2bd83918-60ae-ced2-0000-000000000000. Details: An unhandled exception occurred during the execution of the workflow instance. Exception details: System.ArgumentNullException: Value cannot be null. Parameter name: Input at Microsoft.Activities.Hosting.Runtime.Subroutine.SubroutineChild.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)

The workflow does not continue to run its execution which results in the renaming steps failed to do their job.

I am having this issue for a very long time now and it causes me problem.

Is there any way we can handle exceptions in the workflows? So that if a steps fails we can handle it properly?

Answer 1

We do not have exact exception handling in workflow as we have in server side coding (try ... catch .... finally) but we can definitely check for empty values before executing any step. In workflow we can make use of :

If Column:Title is not equal to variable:xyz then do the following