Portfolio Catalogue Item not picking up a specific workflow

[Sam P]

I'm testing a new Catalogue Item in our Test Service.  I have done this many times before however this time I'm stumped!  I have created the Catalogue Item in the normal way, allocating an IC and the Workflow in question.  When I log the request, it acts as though there is no workflow at all, there is no HUD and the only options available on the Action Bar are Update and Assign, it doesn't follow any of the nodes in the Workflow.  

In Service Manager I have:
- made sure the latest versions of the IC and workflow have been published
- confirmed that the workflow has at least one Stage (it has 4)
- made a copy of the workflow, published it, tried again - still didn't work
- changed the Workflow to a known working workflow - this was successful and the Workflow was applied
- created another new Catalogue Item in the same service using completely different IC and Workflow - this was successful
- rolled back to a previously published version from mid-March and this has been successful

Any ideas why the portfolio is not applying the Workflow that it did before?  

[Sam P]

Thought this has resolved itself since last week as I created a new Service Portfolio item this morning and was able to log a request.  Updated the Workflow, republished - no HUD.  Reactivated the previously working version of the same Workflow - no HUD. 

Anyone else seen this?  Thanks

[Sam P]

Just thought I'd close this off - with Hornbills help this was found to be a user error in my parallel processing, thanks Lee for helping with this one