"the delta load failed in PSA itself. So the request in PSA is RED. Is it advisable to delete the failed request from PSA and if i run delta, will the system ask "Repeat delta" ?
Delta request(red) deletion at PSA was wrong. if we delete the psa red request then it won't ask for repeat delta or we may loose those delta records.
we should not delete the failed PSA Request ? or Just we need to run Delta Infopackage ?
Yes, Never delete psa red request which is delta type one. just make failed request red again and try run delta info pack by manual. it will ask for repeat delta.
Assuming as you deleted delta red request at PSA.
So you need find delta records from source and load them into bw by using repair full request with proper selections.
if your data source was LO data source then fill and delete setup tables was mandatory.
Thanks