some more problem with OEM. I cannot start intelligent on HP-UX 11.0. when I type lsnrctl dbsnmp_statrt, return error:

/usr/lib/dld.sl: Invalid version for shared library: /oracle/app/oracle/product/8.1.6/lib/ /libvppdc.sl
/usr/lib/dld.sl: Exec format error

I am not sure if root.sh has been run when Oracle is installed. may cause by that. how to check if root.sh has been run? is there any danger to run root.sh now? already databases run on the server. thanks for suggestions from your experience.