Dynamics of a robot 7 -DOF

Morning........

I have wrote a code to determinate de dynamique of a robot, I have some errors I don't know how to result it.

these are the errors

A null assignment can have only one non-colon index.

Error in sym/privsubsasgn (line 1040)

L_tilde2 = builtin('subsasgn',L_tilde,struct('type','()','subs',{varargin}),R_tilde);

Error in sym/subsasgn (line 877)

C = privsubsasgn(L,R,inds{:});

Error in SerialLink/rne_dh (line 223)

tau(p,j) = t;

Error in SerialLink/rne (line 119)

[varargout{1:nargout}] = rne_dh(robot, args{:});

Error in SerialLink/coriolis (line 93)

tau = robot2.rne(q, QD, zeros(size(q)), 'gravity', [0 0 0]);

This is my code