Hi Bala,
Please check /n/sapapo/c3 in APO for error log, you should get details of the issue there. Also have a look at CFG1 in ECC.
Please check an old thread discussing issue on similar lines as yours, should be helpful for you.
CIF Error -clarification | SCN
If this doesn't solve your issue, please share details of objects you are ciffing.
Rgds
Sourabh