BW Delta Failure - Manual or Repeat Delta

Hello ,

a ) I was wondering if anyone could give me the exact proc: in case a delta to my ODS failed . I would like to delete the failed delta request and reload the delta which will get me the new records as well as old records .However sometimes it loses the delta pointer and makes me reload the entire data starting with an init.I was wondering if anyone could let me know the exact proc of deleting a delta from ods w/o losing the delta pointer and wht measures I might need to take everytime a load fails. Point to note is I have the ods auto activate box off too.

Tx for ur responses

madhu