I showed here how to use *Mathematica* (version 6) to create an interactive simulation of a 2-dimensional Ising model, but the software could be used only by people who owned their own copy of *Mathematica*. I reported here that Wolfram had now made available the *Mathematica Player* online conversion system for transforming *Mathematica* notebooks into a form that can be run by the *Mathematica Player*.

I have submitted my Ising model notebook for online conversion, and I have uploaded the converted notebook here (855 kB) plus a zipped version here (26 kB).

The *Mathematica Player* can be downloaded from here.

I would be interested to hear from anybody who does *not* have *Mathematica* (version 6) whether they can successfully get this converted Ising model notebook to work. I would particularly like comments on the ease of use of the zipped version, because this is by far the more disk-space-efficient way of doing things.

**Update:** Since no-one has responded yet to say that that they have succeeded in getting my converted Ising model notebook to work with *Mathematica Player*, I decided to install *Mathematica Player* on my old notebook PC (which didn't have *Mathematica* already installed) to check things out for myself. I downloaded the zipped version of the converted Ising model notebook, and fired it up in *Mathematica Player*. The contents of the converted notebook look perfectly OK, but seem to be completely inactive, so you can't run the Ising model simulation. I haven't got the faintest idea what is wrong here, so I'll now go away to try to sort this problem out.

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