Hello Mohan
In addition to above parameters try changing the abap/buffersize = 1600000 temporarily.
Not sure whether it will help but you can give it a shot.
If the issue occurs again after modifying the memory parameters like I suggested then you may wait for SAP to reply with a solution.
Maybe you can post the new dump after setting parameter if the job gets dumped out and also the output of the Tx SHMM.
Additionally try to play with the system if you have time and until SAP replies with the help of this SAP note 185185 - Investigating memory bottlenecks w/o the Memory Inspector
Regards
RB