regarding data loading

dear friends,

i got some queries regarding data loading,

1. i am loading the data from LO Cockpit Purchasing Application. i am conducting delta load activities daily. one of the data packet(let us say for example data packet no 8) got failed. how to rectify that and how to do the deltas asusual. please explain with an example.

2. if the delta load or initial load got failed at the source system level then what will be the solution. and what are the reasons for failure. please explain with one example.

3.if the delta load or initial load got failed at the bw level(psa level or transfer rule level) then what will be the solution. and what are the reasons for failure. please explain with one example.

4.if the delta load or initial load got failed at the bw level(update rule level) then what will be the solution. and what are the reasons for failure. please explain with one example.

i need solution for these queries very urgent.

please let me know.

thanks and regards,

hari