Code generation using CasADi not working with current CasADi v3.5.5

[pablokrupa]

When computing the gradients using CasADi v3.5.5, function DM used in function casadi_jacobians() is not recognized.

The following error message is printed:

Unrecognized function or variable 'DM'.

Error in falcopt.generateCode>casadi_jacobians (line 1388)
        if ~isempty(find((full(DM(jac)) ~= 0), 1))

Error in falcopt.generateCode (line 288)
        [d,c,i] = casadi_jacobians( o, o.dynamics,'model_mpc','jac',{'x','u'}); % generate casadi functions