run.sh Java Error

When running run.sh after a successful Installation i'm getting the following error in ../log.txt:

(May 19, 2008 11:04:48 AM), Install, com.installshield.product.service.product.PureJavaProductServiceImpl$DiskSpaceCheck, wrn, null

I thought about too few HDD disk space, but it worked on a machine with less space.

I'm running ubuntu 8.04 Hardy Server

Any ideas?