ORABPEL-77005 Uninitialized data element

Question

Hi,
I created BPM process and I used BusinessRuleTask in it.
During testing I get:
Non Recoverable System Fault :
<bpelFault><faultType>0</faultType><subLanguageExecutionFault xmlns="http://schemas.oracle.com/bpel/extension"><part name="summary"><summary>XPath expression failed to execute. An error occurs while processing the XPath expression; the expression is bpmn:getDataOutput('ruleOutput'). The XPath expression failed to execute; the reason was: ORABPEL-77005 Uninitialized data element. DataOutput ruleOutput is not initialized in flow element BusinessRuleTask. Make sure to initialize DataOutput ruleOutput before using it in flow element BusinessRuleTask. Contact oracle support to resolve the issue. . Check the detailed root cause described in the exception message text and verify that the XPath query is correct. </summary></part><part name="code"><code>XPathExecutionError</code></part></subLanguageExecutionFault></bpelFault>
Before BusinessRuleTask step I initialized ruleOutput, but the result is the same..
have you any idea what's wrong?

Answer 1

Sharing another scenario as it might help others.
Instead of "DataOutput [variable] is not initialized" I encountered
Uninitialized data element.
DataInput execData is not initialized in flow element [task name]
Make sure to initialize DataInput execData before using it in flow element [process name]
The issue was in the log-handler (Before Output association) of the human-task, I logged the task execData (which is a system variable that gets populated with task execution data).
ora:getContentAsString(bpmn:getDataOutput('execData'))
The problem was resolved after I removed the above statement from the log handler.