-Active sales is not valid
Log in to SIOI and go to Setup II -> Active Sales Period. Check each date.
-Transaction has been interfaced to Webaccount
Log in to Webaccount, and check Accounts Payable/ Accounts Receivable to see if the transaction is found in data.
-Fiscal period in Webaccount is not valid and it’s locked
Log in to Webaccount and go to Organize -> Fiscal Period. Check the record as well as “lock” box.