Oracle 11g R2 installer fails on HP-UX 11iv3

Running the installer of any of the products (client, grid, database) of Oracle Database 11g Release 2 on HP-UX 11iv3 (Itanium) fails with:
"An internal error occurred within cluster verification framework"

After starting ./runInstaller the following error window pops-up:

Also at the installAction$DATE.log the following error can be seen:

SEVERE: [FATAL] An internal error occurred within cluster verification framework
Unable to get the current group.

This happens, because patch PHCO_40381 is not installed. There is a list of patches to be installed at 2.3.4 Patch Requirement of the Database Installation guide for HP-UX.

The first one is:
PHCO_40381 11.31 Disk Owner Patch

The patch is available from ITRC. It's 205Kb big and it fixes behavior of the command diskowner. The installation of the patch does not require reboot of the server.

After the installation of the patch, runInstaller starts succesfully.

There is also MOS Doc ID regarding this problem:
HP-UX: 11gR2 runInstaller Fails with "An internal error occurred within cluster verification framework" [ID 983713.1]

Regards,
Sve