there are more than one phase-dependent interaction in the scalar potential. In the MSSM, the only tree-level term is the soft scalar mass term $B\mu H_{1}H_{2}$. Analytic terms of higher dimensions generated at the one loop level can conspirate with the tree-level one to induce spontaneous CP violation. However, this has been shown [@Poma1] to entail a very low upper limit on one of the scalar masses which is inconsistent with present experiments at LEP. The classical scalar potential processes a richer structure in the (M+1)SSM, with three additional complex scalar couplings (one of dimension four, two cubic soft terms, see next section). The conditions for CP spontaneous breaking in this type of models have been shown [@Romao] to imply a negative eigenvalue in the scalar (mass$)^2$ matrix. However, top quark-squark loop corrections could shift this eigenvalue to positive values. Thus spontaneous CP violation would occur for appropriate values of the parameters and one or two light scalars are predicted [@Baba]. This issue certainly deserves a more detailed comparison with phenomenology; it lies outside the purview of the present investigation. Because the very small region in the (M+1)SSM parameter space consistent with spontaneous CP violation and those selected by our 