Oracle Receivables : Auto Invoice:Import
Auto invoice Error:-
You must supply an invoice number when your batch source indicates manual invoice numbering; otherwise you must leave invoice number blank.
Resolution:
check TRX_NUMBER column, it have any value.
Also in Transaction Batch source, Automatic Transaction numbering is not checked.
So either check Automatic Transaction numbering for Transaction Batch Source or populate TRX_NUMBER.
May be below one of the reason the error occurs
The Profile option for sequence was set as Not Used at Site level,. After changed it to Partially Used the Invoice nos. are generated as per expectation from the sequence