regarding sparse and speye function in matlab simulink

sir i used sparse and spey function in matlab simulink. i declared both to be extrinsic still getting error....its is showing me this error..please help me....

    coder.extrinsic('sparse')
 coder.extrinsic('speye')
....
....
....
    L = sparse(indicies_x,indicies_y,elements,dimI(1)*dimI(2),dimI(1)*dimI(2));
    k=speye(size(L));

      T = ((L + .0001 .* k) \ T_est(:) .* .0001);
    T = reshape(T, size(T_est));

and the error messgae is

 Expected either a logical, char, int, fi, single, or double. Found an mxArray. MxArrays are returned from calls to the MATLAB interpreter and are not supported inside expressions. They may only be used on the right-hand side of assignments and as arguments to extrinsic functions.

Function 'MATLAB Function6' (#167.2932.2933), line 78, column 26: "k" Launch diagnostic report. Component: MATLAB Function | Category: Coder error

 Undefined function or variable 'T'. The first assignment to a local variable determines its class.

Function 'MATLAB Function6' (#167.2973.2974), line 79, column 17: "T" Launch diagnostic report. Component: MATLAB Function | Category: Coder error