Thanks for checking in Paul, good to know somebody else is having the same 
problem!  Same here, other workflows are working as predicted, but this one 
seems to be troublesome.

-- Bill

On Monday, April 9, 2018 at 2:41:43 AM UTC-5, Paul Münch wrote:
>
> Hi,
>
> we bother the same issue but didn't found a solution, yet. Other customize 
> workflows (pre implemented or self customized) are working fine.
>
> Best regards,
>
> Paul Münch
>
> On 05.04.2018 17:18, Bill T wrote:
>
> All, 
>  
> I have configurable workflow enabled in my DSpace v5.8 instance, but so 
> far have only used the default, backwards compatible, 3 step workflow 
> (works fine).  I am attempting to implement the selectSingleReviewer 
> workflow.
>
> I mapped the workflow to a collection.  In the collection, I have assigned 
> the ReviewManager role.  When I submit an item to that collection, the 
> assign task appears on the ReviewManager's submission page, and I can 
> accept the task and assign a reviewer.
>
> The assigned reviewer is able to accept the task.  He is able to REJECT 
> the item, and it returns to the submitter as an unfinished submission.  
> However, if the reviewer tries to APPROVE the item, an error page displays 
> with the following message;
>
> An error has occurred:
> JavaException: org.dspace.xmlworkflow.WorkflowException: null
>
> and a stack trace in the dspace log that begins with:
>
> java.lang.NullPointerException
>         at 
> org.dspace.xmlworkflow.WorkflowRequirementsManager.addFinishedUser(WorkflowRequirementsManager.java:126)
>         at 
> org.dspace.xmlworkflow.XmlWorkflowManager.processOutcome(XmlWorkflowManager.java:242)
>         at 
> org.dspace.xmlworkflow.XmlWorkflowManager.doState(XmlWorkflowManager.java:177)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>         at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:498)
> much much more, available on request...
>
> The environment is version 5.8, XMLUI
> Red Hat Enterprise Linux 7.4
> postgresql 9.6.2
> tomcat 8.5.14
> java 1.8
>
> Any ideas?  Did I miss a step?
>
> Thanks in advanced,
> -- Bill
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