1. For no errors under RedHat 6.2, I had to add at least one kill(all) statement to the rtest*.mac files (in particular to rtest4.mac). With more RAM, this might not be needed. 2. Some maxima-5.6 RPMs you find on the web are broken; try building maxima from the latest development sources (there are several maxima-5.6 versions). Regards blw