I just installed trial 16.3 on Centos 6.6, without any problems.
When i tried to compile some weather model libraries, i got a problem :
/opt/pgi/linux86-64/16.3/lib/libC.so: file not recognized: File truncated
when i checked the lib file i got:
[wrftest@ANY ~/esmf]$ ll /opt/pgi/linux86-64/16.3/lib/libC.so -r--r--r--. 1 root root 0 Mar 10 02:40 /opt/pgi/linux86-64/16.3/lib/libC.so
The installation did complain that it is not able to find 32-bit compiler, but i don’t need it, so i didn’t install it, and it continued to a successful end, once i said ok.