Hi,
it won't miss any delta.
in ECC RSA7 have view 1. delta mode
2. repeat delta
1.delta mode - if you have 100 records if you run the IP it will go to BW side
and delta fail make it RED then do the repair full.
2. repeat delta - if 100 records transfered to BW then same records move to repeat delta in ECC RSA7.
if you run repair full system will capture form repeat delta form ECC RSA7.
NOTE - before deleting delta request make ti RED then delete it.
Thanks,
Phani.