More than 1000 Line items

Hi

User has done the billing for 1300 line items by using transaction code VF01. After completing that process there is a option TO release Accounting, when user select on that button system throwing an error "Maximum number of items in FI

reached".

We know that from FI side system will not allow more than 999 line items. Since we are using 4.7 version.

Invoice have already send to the customer. So, How to solve this issue.

Please provide me the solution as early as possible.

Your help would really appreciated.

Regards,

Schilukuri