wxMaxima + LaTeX (Lisp) help, please

Hello,

I am trying to make the following recipe to work again for the new version of Maxima. Can somebody help me? I asked the same question on the Spanish forum.

https://trisquel.info/en/wiki/recipe-latex-gnuplot-tight-box-eps-maxima

Maxima encountered a Lisp error:

Error in AND [or a callee]: The variable CCOL is unbound.

Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.