ORABPEL-77005 Uninitialized data element. DataOutput workflowRequestBO is not initialized in flow el

Hi All,

We have a simple BPM process with single humantask.

We have random failures of the instances with the error below:

oracle.bpm.bpmn.engine.model.runtime.microinstructions.TrappableException: faultName: {{http://schemas.oracle.com/bpel/extension}subLanguageExecutionFault} messageType: {{http://schemas.oracle.com/bpel/extension}RuntimeFaultMessage} cause: {faultName: {{http://schemas.oracle.com/bpel/extension}subLanguageExecutionFault} messageType: {{http://schemas.oracle.com/bpel/extension}RuntimeFaultMessage} cause: {XPath expression failed to execute. An error occurs while processing the XPath expression; the expression is bpmn:getDataOutput('workflowRequestBO'). The XPath expression failed to execute; the reason was: ORABPEL-77005 Uninitialized data element. DataOutput workflowRequestBO is not initialized in flow element ProcessRequest. Make sure to initialize DataOutput workflowRequestBO before using it in flow element ProcessRequest. 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. } }