Verify if any previous approvers are listed. If the history is blank or throws the error immediately, the workflow failed at the very first step.
Often, simply ensuring the 'Workflow Background Process' request is running for the 'PO Approval' item type can kickstart stuck documents. app-po-14288
According to the Oracle Purchasing Approval Troubleshooting Guide, this error is most frequently encountered when a document—such as a Purchase Order (PO) or Requisition—is stuck with a status of . There are two primary reasons this happens: Verify if any previous approvers are listed
In persistent cases, a database script (often provided by Oracle Support) may be needed to reset the document status from 'In Process' back to 'Incomplete' or 'Requires Reapproval' so it can be submitted again. app-po-14288
For more detailed technical walkthroughs, users often refer to resources like the Oracle Troubleshooting Guide on Scribd .