Further to my previous posting, here are some comments about installing MIRA from our Peter who maintains our software. It occurs to me that there may be another issue in here. Snow Leopard has become more picky about matching library wordsizes so that a 32-bit library won't work with a 64 bit object file. Earlier MacOSes were less fussy about this. My observation on building mira-3.0.3 under Snow Leopard was that this created problems on one system which had the boost libraries built under Leopard. The solution was to rebuild everything under Snow Leopard using the latest Boost library release. Regards, Craig Hi Peter and Bastien, We've compiled MIRA3.0.3 (and the whole 3.x.x set of programs) without problems. We did have problems of these kinds in earlier versions of MIRA and these related to units of the program and elements of the libraries using the same names. Bastien fixed these as part of the 3.0.0 upgrade. One thing to note is that the developer tools are apparently not installed by default when you upgrade to Snow Leopard and have to be explicitly installed. That did cause some interesting problems when we first tried to compile MIRA after upgrading to Snow Leopard, and it might be worth checking in your case. Regards, Craig -- Craig Marshall craig.marshall@xxxxxxxxxxx<mailto:craig.marshall@xxxxxxxxxxx> Biochemistry http://biochem.otago.ac.nz/staff/marshall/cmarshall.html University of Otago Phone +64 3 479 7570 Fax +64 3 479 7866