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Task assigment exception

Question asked by kerkira67 on Nov 13, 2006
Latest reply on Nov 14, 2006 by kerkira67
I tried to write a workflow which used the task assignment mechanism described in the Workflow Administration section of the Wiki.

It deploys ok but when I start the workflow (using the "Start Advenced Workflow" command from the context menu of a document) at the last step of the wizard I get an exception whose stacktrace ends with the following message:

Caused by: org.jbpm.JbpmException: actor-id expression '#{['cm:userName']}' returned null

I also tried the adhoc workflow example, which gives the same problem.

Any clue?