Answer: No. It is true that AOMX needs some subroutines from the EISPACK library but they are added to the source code as a file eispsub.f. In case that a particularly efficient implementation of the NAG library is available on the computer on which AOMX shall be installed, it may be worth to use the NAG routines instead of the EISPACK routines for matrix diagonalization. For this purpose, the lines marked NAG in cols. 73ff must be activated and those marked EISPACK must be deactivated in routine calc.f.