I found the issue. It seems the Ubuntu 11.04 was actually 32bit version. So I tried the 32bit installer "installbuilder-enterprise-9.5.5-linux-installer.run" and it worked perfectly. Thanks for your time and help.
answered 25 Mar '15, 05:03
InstallBuilder should work properly on Ubuntu 11.04.
What happens if you run the installer from terminal with:
Does it work properly then?
answered 25 Mar '15, 04:22