hi,
as you are saying :
If I run by using ABAP program(RMBWV313) in R3 records are coming RSA7, other wise its showing zero records.
Generally we do schedule this job to run periodically like after every 30 mins so that will extract data from extraction Q to delta Q.
Go to SM 37 and check ( put * in user filed and given prog) and see whether it is schedule or not.
If not just schedule this job to run every 30 mins and you will get the records in RSA7, as soon as new data comes and this prog execute in background.
Thank-You.
Regards,
VB