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Topic: Version 9 Trial contaminates Version 8 running paid
Replies: 8   Last Post: Oct 18, 2013 4:42 AM

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George Woodrow III

Posts: 123
Registered: 12/7/04
Re: Version 9 Trial contaminates Version 8 running paid
Posted: Oct 9, 2013 10:04 PM
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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 <> 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 []
> Enviado el: martes, 8 de octubre de 2013 13:42
> Para:
> 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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