> with maximum quality. Size of the relevant PyMOL v1.1 file is 100 MB (or 
> 31 MB after reducing objects I do not need for the figure production). 

If lack of memory is the problem, try loading your scene manually or
through a script instead of using a session file.  For reasons I don't
recall at the moment, pymol uses more memory with a pse file than with
the same objects loaded through a script (you could check the list
archives for more details if you're curious).


> PyMOL simply crashes under Windows Vista Home Premium as well as under 
> Ubuntu Linux v8.04 LTS without error report. My dual OS system is a 

Not sure about windows, but with linux you should get some level of
messages by launching from a command prompt instead of an icon.  If
you're running out of memory, you'll get a core dump message (at least,
that the usual symptom on my systems.

> both OS are 32 bit and therefore to my (limited) knowledge cannot handle 
> more than 2 GB in a single task, RAM limitation might still be an issue 

You might want to have top running in a different terminal so watch how
much memory pymol is trying to use (or is able to use before crashing).


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