SharePoint Online workflows show server error when link is clicked. Cannot terminate them.

Question

This is for SharePoint Online. I have a number of workflows on a list that are in a 'suspended' state when I navigate to the workflows page for the item. When I click the link to view the workflow, I get a server error.  I need to terminate these workflows.

Answer 1

Hi,
Based on your description, you want to terminate these workflows in SharePoint online.
You can terminate these workflows by the CSOM implementation through passing the ID of the list and list item.
You can refer to the code snippets below.
// connect to the workflow services via a CSOM client context
var clientContext = new ClientContext(siteCollectionUrl);
var workflowServicesManager = new WorkflowServicesManager(clientContext, clientContext.Web);
// connect to the instance service
var workflowInstanceService = workflowServicesManager.GetWorkflowInstanceService();
// get all instances
var workflowInstances = workflowInstanceService.EnumerateInstancesForListItem(listId, listItemId);
clientContext.Load(workflowInstances);
clientContext.ExecuteQuery();
foreach (var instance in workflowInstances)
// is this what we are looking for?
// if so, suspend it
workflowInstanceService.SuspendWorkflow(instance);
// or you can terminate it
workflowInstanceService.TerminateWorkflow(instance);
There is a similar case:
https://social.msdn.microsoft.com/Forums/office/en-US/c62e1d54-bd58-4d38-9514-d58cd22557e4/stop-and-restart-workflow-on-item-edit-sharepoint-online?forum=sharepointdevelopment
Best regards
Sara Fan
TechNet Community Support