Hi Prakash,   My solution requires estimated disk space of 1.1 TB for scratch files, and i have it in two drives as F drive - 900 GB, and E drive -300 GB.   I am able to assign one drive as tmpdir for scratch files as TMPDIR= FILESIZE=300, E:\TMP    When i am solving my file in F drive. It is still showing that less space for scratch files. So i have aborted the run. I am attaching .out and .stat file also.   Is it possible to solve this model by this meth