Title says it! RC1 built without a hitch on this box (using the Developers Tool Kit <dtk> compiler) and passed all tests. RC2 fails about 8 tests, dumping core after lib/sdbm.t and /lib/bigfltpm.t. From what I'm seeing in the screen output, Perl is failing to heed pragmas such as no warnings 'once'; no warnings 'redefine'; I'm not sure if this is the cause of the test failures or merely another symptom of the underlying problem. The build goes a bit more smoothly using gcc-2.95.2, with the only failures being the abovementioned core dumps. I'm currently rebuilding with debugging set in an effort at tracking them down. BTW, dropping back from the dtk compiler made no difference in the misbehavior. It's not source corruption, as the same download builds and works cheerfully on x86 Linux. All builds were performed using defaults (./Configure -des) on Tru64 Unix v5.0 w/ 1st service pack applied. I've attached screen captures of the test runs. I don't have all that much experience developing or debugging in this environment (spend most of my time on x86 Linux and AIX), so any suggestions are appreciated. SteveThread Next