1.
When doing potential energy surfaces or basis set exponent optimization
watch out for a reordering of the molecular orbitals (MOs) from scfpq.
MO reordering may result in an inconsistent configs from cgdbg
or an inconsistent cidrtfl from cidrt; inconsistent with respect to
the geometry change for PESs or with respect to exponent change for
basis set optimization, consequently, the tell tale sign of this
problem is a discontinuity in an energy plot.

2.
MO reordering may also result from performing an mcscf calculation.

3.
For efficient use of disk space in a ciudg calculation
the maximum number of expansion vectors, NVCIMX,
should be set less than ~6 more than the number of roots, NROOT
in the ciudgin file.