| ERROR | XmlPatch could not process the XML PI oracle-xmldiff |
| CAUSE | The diff document either did not specify the XML Processing Instruction oracle-xmldiff or did not specify all data required by XmlPatch. The PI should be the first child of the top-level xdiff element. This error is also thrown when the output-model is snapshot and operations-in-docorder is false. |
| ACTION | Specify the oracle-xmldiff PI correctly. See documentation for XmlPatch C function in xmldf.h. |