Error using colormap Too many input arguments.

Hey everybody, Does anyone of you know the following error when working with the Matlab live link:

mphplot(model,'pg1','rangenum',1);

Error using colormap
Too many input arguments.

Error in .../mli/mphplot.p>l_colorlegend (line 1384)

Error in .../mli/mphplot.p>addplot (line 300)

Error in .../mli/mphplot.p>mphplot (line 154)

? Any suggestions about how to fix it are MOST welcome.
Cheers, Sabine