[Freesurfer] trac all - cant allocate memory

Dear FS experts, when running tracula I get the following error (see below and trac-all.log attached to this mail). It seems that memory cannot be allocated but I have a PowerMac with 12 GB RAM and I suppose this should be enough. Any ideas how I can solve this problem? Thanks, Michael

dmri_train(50487) malloc: *** mmap(size=159744) failed (error code=12) *** error: can't allocate region *** set a breakpoint in malloc_error_break to debug MRIalloc(218, 182, 182): could not allocate 158704 bytes for 14th slice

Cannot allocate memory Darwin fslmachine.charite.de 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386 i386

trac-preproc exited with ERRORS at Tue Jun 26 15:12:03 CEST 2012