"soacon: Archmon unable to create named pipe."
*Cause: mknod() failed to create named pipe ?/dbs/arch2mon_@.
*Action: Your current OS login may lack write permission for the
ORACLE_HOME/dbs directory. Only userids in the dba group of a
given instance can run archmon for that ORACLE_SID. Make sure
that the ORACLE_HOME directory is correct in oratab.