Make sure you are running one of the following versions of UNIX with the latest available patches:
HP-UX
IBM AIX
Sun Solaris SPARC
Sun Solaris x86
Linux Systems
Red Hat Linux
Red Flag Linux
SUSE Linux
Debian GNU/Linux
Linspire Linux
Linpus Linux
For specific supported operating system versions, see the Web site or the file /usr/ibmprint/docs/supported-platforms.txt after installation.