Hi:

On babyblue, my code compiles (from /home) and executes (on /ptmp)
ok when built for serial execution as follows:

FC      = /usr/bin/xlf90
FFLAGS = -qfixed -qarch=pwr3 -qtune=pwr3  -qrealsize=8 -WF,-DAIX \
         -I/usr/local/include -O3 -qhot -qalias=noaryovrlp
LIBS    = -L /usr/local/lib32/r4i4 -lmass -lnetcdf

I have several !$OMP directives in the code, including THREAD_PRIVATE.
To test this (only 2 procs per node), I attempt to compile this way:

FC      = /usr/bin/xlf90_r
FFLAGS  = -qfixed -qarch=pwr3 -qtune=pwr3 -qrealsize=8 \
        -I/usr/local/include -qalias=noaryovrlp -O3 \
        -qthreaded -qsmp=omp -WF,-DAIX

However, this fails with "Internal compiler error" on 9 out of
the 121 source files, e.g. (this is the 1st one it dies on):

bb0001en% gnumake 
/usr/bin/xlf90_r -c -qfixed -qarch=pwr3 -qtune=pwr3 -qrealsize=8 -I/usr/local/include -qalias=noaryovrlp -O3 -qthreaded -qsmp=omp -WF,-DAIX chapmn.f
"chapmn.f", 1514-008 (W) Variable racs is misaligned.  This may affect the efficiency of the code.
** chapmn   === End of Compilation 1 ===
/usr/bin/xlf90_r: 1501-230 Internal compiler error; please contact your Service Representative
1501-511  Compilation failed for file chapmn.f.
gnumake: *** [chapmn.o] Error 40
 
I can't tell offhand what these 9 files have in common that
might be causing this problem.  I have tried -O1 and -O2 and 
various other combinations. Any ideas?
Thanks,

--Ben