To run ROMSin bluevista, you need to change the following FFLAGS in AIX-xlf.mk

This is the email from Sidd, consult1.
Hi Hyodae, Please do not use "-qarch=pwr4 -qtune=pwr4".
This option generates codes for specific architecture i.e. pwr4. Bluevista is pwr5.
If you make it auto, it will sense the architecture in which you are running the compilation command and tune accordingly.
Thanks and with warm regards, --Sidd´┐Ż

The following chnage:
Compilers/AIX-xlf.mk
# FFLAGS := -qsuffix=f=f90 -qmaxmem=-1 -qarch=pwr4 -qtune=pwr4
FFLAGS := -qsuffix=f=f90 -qmaxmem=-1 -qarch=auto -qtune=auto