Hi,

1) the HF energy is not used in the optimization of the auxiliary basis functions

for RI-MP2/RI-CC2. At some point of the basis set optimization it is overwritten

by something else. Relax needs the functional which should be minimized

and its gradient.

2) coalescence of parameters is a very common problem in non-linear

optimization/fitting... the reasons can be very different:

* redundant exponents

* missing tighter or diffuser exponents

* missing exponents of higher or lower angular momentum

Christof