CA Access Gateway Install Error: "JRE libraries are missing or not compatible"

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We ran into a problem during a recent installation of CA Access Gateway 12.6 (formerly known as CA Secure Proxy Server) on Red Hat Linux, and would like to share the solution. 

Upon launching the installer, the following error was displayed:  "JRE libraries are missing or not compatible..."

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This may have to do with insufficient permissions in the /tmp directory.  In environments where obtaining the required permissions may not be straightforward due to how the server is locked down, security policies, etc., there is a simple workaround.

You need to create a new "temp" directory in a location where you do have the proper permissions (for example, /opt/myapplication/tmp), and then set an environment variable called "IATEMPDIR".  Example:

mkdir /opt/myapplication/tmp

export IATEMPDIR=/opt/myapplication/tmp

You should not be able to successfully launch the installer without encountering the "JRE libraries are missing or not compatible" error.

Good luck!