Resolution:
Description:
============
After setting the DISPLAY variable on the machine, the above error is still seen when running the installer in GUI mode.

Causes:
===========
Intaller uses 32-bit JVM's as launchers.  Java needs a X library package called "libXtst".  If that library is not found on the system, Java will not allow any GUI operations.
However, these 32-bit libraries (which used by 32-bit JVM) are not installed by default on Redhat Linux 6.  

Resolution:
===========
Run the following commands on the machine to check whether the 32-bit libraries are installed.

rpm -q libXst
Output: &ltpackage_name>

rpm -ql &ltpackage_name>
Output: libraries included in this package

Install the 32- bit "libXtst" libraries if they are not found on the machine.

Environment:
===========
Redhat Linux 6.x

Keywords:
===========
graphical mode X library GUI

Cause of the following error when installing RV in GUI mode on Redhat Linux 6. "The installer is unable to run in graphical mode. Try running the installer with the -console or -silent flag'".