Hi Prasop,
You should add BI category as one of your requirements. Which is a conrel plant to plant transfer category assigned generally.
Check once you have created the STO it is getting reflected in APO box , Check / sapapo/ rrp3 to see if the stop is getting reflected in the elements tab
If not assuming you have activated you integration model correctly for STO check the error you are facing in SMQ1 .
