Hi Harshil,
Would suggest to change the setting of the update tab in normal DTP as " Update valid records reporting possible " and increase the number of erroneous records there .
Then Create an Error DTP with the same setting .
All the erroneous records would get collected in the error stack . Double click the erroneous records to get the error message.You can rectify over there and then can run the error DTP.
Please check http://help.sap.com/saphelp_nw70/helpdata/en/42/fbd598481e1a61e10000000a422035/content.htm
You also can rectify them at the PSA level in the PSA maintainence.
Thanks
Kamal