Perhaps this is a known issue, but a fairly straightforward KRCI on the Am atom fails with no determinants found (in any symmetry). The same input works fine with Dirac21. An input snippet is given below.
Regards, -Kirk
*SCF
.CLOSED SHELL
44 44
.OPEN SHELL
1
7/0,14
*KRCI
.CI PROGRAM
LUCIAREL
.INACTIVE
21 19 # freeze through 6s and 5p
.CIROOTS
7u 1
.GAS SHELLS
3
4 6 / 0 3 # 6p
13 15 / 1 7 # 7s and 5f
15 15 / 17 23