Mathcad array problem.

[Notebook]

I have this error message from Mathad, can't access the variable. Odd, because its happy to plot the array values?

http://i89.photobucket.com/albums/k207/Notebook_04/Graph1-1.jpg

All help appreciated.

Edit:-

Using the default time constant s as the axis variable helped, and made things clearer

http://i89.photobucket.com/albums/k207/Notebook_04/Graph2.jpg

N.