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Re: Version 9 Trial contaminates Version 8 running paid

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  • Subject: [mg131813] Re: Version 9 Trial contaminates Version 8 running paid
  • From: George Woodrow III <georgevw3 at>
  • Date: Wed, 9 Oct 2013 22:09:47 -0400 (EDT)
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Hi --

There is a file installed by Mathematica (on the mac it is inside a 
folder called Library) called mathpass. You could search for it.

You can open it with a text editor.

Each time that you install a version of Mathematica, a new license or 
activation code is written to the file. This file is shared by all 
versions of mathematica on your system.

When Mathematica starts up, it looks for a valid activation. It uses the 
first one it sees.

Theoretically, when your trial license for version 9 expires, 
Mathematica 8 will search and find your valid license for version 8.

I have a similar problem -- being a beta tester for Mathematica 10. When 
I crank up Mathematica 9, it is using the activation for v 10.

If you are concerned, you can edit mathpass to get rid of the trial 
activation. I believe that you could simply delete mathpass and when you 
start up version 8 again, simply reactivate it.

If you look at the Wolfram documentation for resetting Mathematica, it 
suggests that as a last resort, you can deleter the Mathematica folders 
in the two Library folders (the computer wide one and the user-specific 
one). Details vary by system. I had an issue recently where I had to do 
this, and when I restarted Mathematica 9, I had to re-activate, but it 

It should be possible to simply delete mathpass.

Check with customer service.


On Oct 9, 2013, at 2:11 AM, E. Martin-Serrano <eMartinSerrano at> wrote:

> Hi,
> Now, I have realized that the notebooks created and running  under the V8
> paid version also display the legend Wolfram Mathematica -  PRODUCT
> So it is not only the Welcome Screen what has been contaminated by the
> trial V9 version.
> De: E. Martin-Serrano [mailto:eMartinSerrano at]
> Enviado el: martes, 8 de octubre de 2013 13:42
> Para: mathgroup at
> Asunto: Version 9 Trial contaminates Version 8 running paid version
> Hi,
> Last week, I downloaded and installed V9 Trial, which I have already
> uninstalled after only three days.
> It seems that, somehow, V9 was, conflicting with V8, which is the version I
> am currently running. I uninstalled the Trial V9 to check whether I could
> find the conflicting points with the idea of reinstalling V9 again to
> continue the V9 trial.
> However, to my surprise, after the V9 trial uninstallation,  the former V8
> version Welcome screen is warning that my V8 paid Mathematica is =a trial
> product and that there are 26 days left for it.
> I have used the Windows uninstall tool to get rid of Mathematica V9 Trial
> and probably there are some leftovers still working in the original V8
> system (a clear indication of that V9 is interfering with the paid V8 
> after the trial V9  has been uninstalled). Besides, after finishing the
> uninstallation, Windows8  warned it could not uninstall the whole
> Mathematica V9 trial stuff so that I ought to move manually the trial V9
> kernel to the  recycle bin.
> I hope someone could provide some clue about what is going on before the my
> current 26 days v8 trial period is over
> Regards
> E. Martin-Serrano
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