Plot shape file on a 3D map

Hi!

I made a map of bathymetrie in 3D, but I want to include in this 3D map shape files, line and others points, that are 2D.

%...

P = m_shaperead('muc');

for j=1:length(P.ncst),

m_line(P.ncst{j}(:,1),P.ncst{j}(:,2), 'LineWidth',3, 'marker','pentagram','markersize',5,'color','r');

end;

n = length(P) ;

x = zeros(n,1) ; y =zeros(n,1) ;

% or using m_line:

m_line(LonNB2, LatNB2,'LineWidth',2,'Color','m');

when I use this code, that works in 2D maps but in the 3D script then give this error:

Output argument "X" (and maybe others) not assigned during call to "m_ll2xy".

Error in m_line (line 49)

[X,Y]=m_ll2xy(long,lat,'clipping',clp);

Is a way to save 2D shapes in 3D or other solution?

Thanks!