"Errors occurred during the extraction" for delta Extraction

Hi All,

I have one data source which is getting extracted by using the FM.Initially this is only full load.But now I have enabled delta on this data source.

While extracting the data from RSA3, with delta option, I am getting the error "Errors occurred during the extraction".

But I have given Target System, replicated the data source in target system and reactivated it again.

But again I am getting the error "Errors occurred during the extraction".

Could you please help me on this.