Christian Rickert wrote:

At the university, I saved a huge project of mine containing a density map and multiple (!) rigid-body fitted pdbs. Although this system is a 32-bit Kubuntu 8.04 only (4 Gig of RAM installed), I observed the same problems with my 64-bit SUSE 10.3 (4 Gig of RAM installed as well) at work.

Creating this project took me two days in total, so I really would appreciate any suggestions from you ...

Hi Christian, It's possible that your shell is imposing a limit on memory use by a single process. Before starting Chimera, remove the memory limit of your shell by typing: csh-type shell: unlimit sh-type shell: ulimit -v unlimited Let me know if this helps or not. --Eric Eric Pettersen UCSF Computer Graphics Lab http://www.cgl.ucsf.edu