By combining a total-angular-momentum representation, the smooth-exterior complex dilation technique and a three-dimensional finite-element code, a study of some resonances in a model of an electronic surface of the van der Waals complex NeICl was performed. For zero angular momentum, our results show good agreement with earlier calculations. Using the present formalism we believe that we are able to report a fully quantum-mechanical calculation of predissociation widths for a triatomic molecule.