Trying to create a WO from a SO by checking "Create WO" on Assembly item line. Netsuite wont let me approve the SO with error message "You must enter at least one line item for this transaction"... Any ideas

Add a bom to this assembly, make it default

Already done, did not help. Found out why it did not work. I had to change "Supply Allocation strategy on work order" on the page "Supply allocation setup". And set the date on the revision on the BOM on the assembly item to the day before..