how to trigger the TS TS20000167 in the SAP Standard workflow : WS2000075 （2）

Hi Expert,

Now i am working on the PO release workflow.i just use the SAP standard workflow WS20000075 and it works fine for PO release, but it doesnot work for PO cancel . Do i miss some setting for that ?,please advise .

Below is the workflow log for PO release canncel .

Seem,the cancel event not trigger, i cannot find it in event trace

check in SBWP,outbox--->work items executed by me ,no workflow about cancel event

Below is the PO workflow i used. it is copied from sap standard workflow WS20000075, no changed. Do i miss someting,please advise ,thanks :-)

Best regards,

Haimin