Name

ELEMENT PAIR aa AND bb IS NOT VALID IN ...

Description

This error message indicates that the specified pair of elements has not been parameterized for MINDO3. This is a fatal error message. Switching to a different method may resolve this error. See Table 3.1, “MINDO3 Atom Pair Parameters” and Table 3.2, “Elemental Parameter Sets for all methods (except MINDO3)” for a list of elements that have parameters for each semiempirical method.