This article explains one of the possibilities that can cause Purchase Order BILL to fail.
Item Number caused this error due to double asterisk in Item Notes field.
Unable to bill PO# E3010.
Item code #04EP057 have long description from MYOB and it contained double asterisk.
Resolution: Manually removed double asterisk from PO Item description and try to BILL again. Successfully synced to MYOB.
This issue was blocking other Purchase Orders to Bill. Users to remove double asterisk from Item card and alert not to use in descriptions.
Datapel suggest to review items list and remove if any double asterisk from Item description and Notes.