The crash probably has to do with your system setup, missing library or similar. If you are really suspicious that it's MODELLER problem please send me I/O tar ball and I will run it here.
Yes, you can have as many versions of MODELLER as you want running in parallel. You just need to set-up variables and paths properly in your .cshrc file.
Bozidar
> I am facing a problem with Modeller6V2. I am using > Red hat Linux (7.2). The problem is that system > crashes when I try to model my protein. Tutorial and > some other proteins run fine. My protein has 500 > residues. It creates .ini file, and then after few > seconds, it crashes. I get something like this: > > Ooops: 000 > CPU: 0 > EIP: 0010 : [<c019ea747>] > Stacks------------ > -------------------------------------------- > Kernel panic:Aiee, killing interrupt handler. In > interrrupt handler.. not syncing > > The same protein can be modelled using Modeller4 (Red > hat 6.2, on another computer). I can send the log file > if required. Can anyone help me to resolve the > problem? > > One more point: Is it possible to run modeller4 as > well as modeller6v2 on the same machine? I am getting > a 'command not found' error with modeller4, while > mod6v2 works okay.