libpointer('MATLAB arrayPtr')

Trying to set variable Comp_out (type mxArray** )for return value from external dll. This gives an error: Comp_out =libpointer('MATLAB arrayPtr') Type was not found.

Error in libpointer (line 17) ptr=lib.pointer(varargin{:});

Yet, this gives no error, but returns nothing:

Comp_out =libpointer('MATLAB array')

Comp_out =

libpointer