Error specifying a triangle connectivity matrix

[JanireEtxegia]

I'm trying to run the openep-demo in order to verify the installation was done succesfully, but I'm getting the folowwig error:

Error in trisurf (line 40)
assert(numel(varargin)>=3 || isa(tri, 'TriRep') || isa(tri, 'triangulation'), ...

Error in drawMap (line 83)
hSurf = trisurf(userdata.surface.triRep.Triangulation, 'edgecolor', 'none');

Error in openep_demo (line 23)
drawMap(userdata, 'type', 'cv', 'orientation', 'ap', 'data', cvdata);

How can I solve this?

Thank you very much!