When you find some thing to be changed or corrected subsequent to intimation from CPC and if you try to do rectification there are few options.
In that one reason- Correction in data.-Tax payer is correcting data in rectification..
Few times it will accept the rectified XML and some times it will not accept -reason -you must file revised return to correct the data.
Is it due to rectification deadline??
Except for the above reason , online rectification done beyond the deadline.Why??