[modeller_usage] max number of optima in resdih.lib

Hi! I need to modify the rotamer definitions in resdih.lib, but I get the following error when adding 4 entries to a residue.

_modeller.error: rdrdih__223E> Internal error: array too small: MDIHOPT current maximum, current need: 4 4

This is the line that creates the error:

CA CB CG OD1 4 0.516 0.194 0.161 0.129 -11.9 69.4 -67.6 154.8 12.5 11.1 23.3 25.7 -180 -90 -90 0 0 90 90 180

using only 3 optima values doesn't give any error. Is there a limit in the maximum number of optima? This info is part of the output but I don't know if its a limit or the number found: Maximal number of dihedral angle optima: 3

Thanks for the help

Luis