Hello, I've found and fixed a major bug in DET intrinsic. In some cases, DET was able to return false value. Now, DET is not computed by eigenvalues anymore but after a PLU decomposition. If you use DET intrinsic and if I were you, I would donwload the last daily snapshot (rpl-4.0.5-daily-20090803.tar.bz2). Regards, JKB