grouping of elements in .msh
 

hi, i'm doing grouping of elements in my mesh (.msh) file (obtained from an ICEM output to CFX) manually. i'm grouping about 18k elements into 100+groups. I have a problem reading this into CFXpre (taking a lot of memory).

Is there anyother way i can do this off the commandline? or can anyone advise on how to go about this? the grouping is impt.