Sage Intacct sync error: Bill XXX cannot be updated in Intacct - Index: 0, Size: 0
Why the sync error occurs
This error occurs when you update a bill linked to a PO in Bill.com and that update tries to sync to Sage Intacct, but the related vendor invoice has been deleted in Sage Intacct, or the connection between the vendor invoice in Sage Intacct and the bill in Bill.com has been broken.
How to Fix the sync error
Contact support to reconnect the bill and vendor invoice, or resync the vendor invoice to Sage Intacct.