Installing on Linux RedHat 5.
Unfortunately, as of the 2017a release, RHEL5 is no longer supported by Lumerical’s software. RHEL5 is nearly at the end of it’s life and will no longer receive maintenance patched as of March 2017. We recommend upgrading to a newer version of the operating system. Otherwise, you can access the 2016b version of Lumerical’s software, which is the last version to support RHEL5.
Obtaining the 2016b version of Lumerical’s software can be done from the downloads page and selecting the "Previous Release’ from the drop down menu.