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I get the value from the property of primaryBusinessObject.
The value is also the key value of another object.
How to I find the object and work it?
Can you clarify your question? Maybe show us how you're getting "primaryBusinessObject?" I'll take a guess that it's workflow related, but I don't know if you're in a wfexpression, or you're getting it with the process getter, or if you're getting it from a wfexecutionobject's processdata.