Hi Stuart,

I have changed grayscale to Grayscale and it seems to work.

The notebook is attached.

Cheers,

Marco

Attachments:

It's not the Grayscale command. If I open the notebook in CDF (Player 9) it loads quickly, and produces the final tour image. However if I open it in Mathematica, and try to evaluate the notebook (it doesn't matter if I evaluate line by line, or the whole notebook at once), it always gives the same error on the last line.

My understanding of the error is that res is the list of shortest path points. res[[2]] should access points from the list, as this is the same as the Part command, perhaps res is going out of scope when it shouldnt. Why this happens to me, and not to others I have no idea.

I am using Linux Ubuntu 14.04. I'll try the Wolfram Programming Cloud.

I tried again with a different image (I used Jorge Luis Borges image), in Mathematica it failed again at the last command, res[[2]] error again. This time it didnt work in CDF Player either, same res[[2]] error

10 months later, I tried again, (i think my version of Mathematica is updated) and it worked, no problems!