mental ray Standalone 2013: Product registration failed: 718E1,.

If you install mental ray Standalone 2013 on Linux and you will see the following error at the very end of the installation process:

Product registration failed: 718E1,.

This is a rather confusing message that can be ignored.  The software, in fact, has been installed correctly.

Thanks to Ryan Harvey on our Maya QA team for  helping out on this post.