We test our implementation of CT-TSH in the developer version of MOPAC2002 software are performed using identical initial conditions. The energies, forces and electronic wavefunctions have been computed using the FOMO-CI method with a semiempirical AM1 Hamiltonian, replacing the standard set of AM1 parameters with a set previously reoptimized for azobenzene by some of us . In particular, a truncated CI within an active space of 13 MOs and 14 electrons is considered, for a total of 94 Slater determinants. All the calculations are performed with the LD algorithm, with an integration time step of 0.1 fs (both for the nuclear and for the electronic degrees of freedom). In the cases where the ODC correction is included, the value of the Gaussian width was 1 a.u. and minimum overlap threshold S min was 0.005.