Po Change Blank Title 93231

with the version 8.03.408b, the report in the purchase management ==> PO Change doesn't work. I will need to rebuild the report. I need to create a BPM, il the porel.promisedt is changed, i will to write in the custom field porel.date01 = today. But in the BPM, how to write : wite to today date in the field date01, only if the promise date is changed.(if the field is updated, write the today date.)

thanks.