My Mathematica keeps asking for Activation Key on startup?

Hi all,

Upon startup, every now and then, my Mathematica program will ask for an activation key. **It is not expired.**I will go on the Wolfram User Portal to find my activation key, and I will enter it. It will not work. I will have to uninstall and redownload Mathematica.

Does anybody have any suggestions or know what may be causing this issue?

Best,
N

One thing you can check is if there is another Mathematica process running (e.g. a previous one was not ended correctly). This might give similar problem.

I can start two Mathematica program processes, but when I try to start a third one, I got this message:

Mathematica cannot find a valid password.

For automatic Web Activation enter your activation key

…

I would recommend contacting Technical Support. They should have the tools and know-how to assist you.

Be sure to include information on your operating system and what version of Mathematica you are using in your request.