Billing Document does not exist
In some of the cases Billing Document No. has been Skipped by 1 or 2 Nos. we have activated number range not buffered in the billing doucument object RV_BELEG in the transaction SNUM
Pl.suggest for what reason the No. range Skips by 1 or 2 Nos. and how to avoid this., for Number range we are using user exit as RV60AFZZ and pl.tell us other than this any user exit available.