Agent Installation failing with ERROR: Error:The port number you entered contains a non-numeric char
[oracle@INFAFRAD12 agent]$ ./runInstaller -silent -responseFile /data01/software/agent11g/linux_x64/response/additional_agent.rsp ORACLE_HOSTNAME=prodfixprev.db
Starting Oracle Universal Installer...
Checking Temp space: must be greater than 150 MB. Actual 12426 MB Passed
Checking swap space: must be greater than 150 MB. Actual 3569 MB Passed
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2013-01-30_01-05-10PM. Please wait ...[oracle@INFAFRAD12 agent]$ *** Check for updates ***
*** Select Installation Type ***
*** Check Prerequisites ***