Currently I am using IP-tuned wB97XD3 with and without PCM on aggregates of perylene derivatives. For one of the systems the calculations crashes after the TDA calculation with the error:

```
Direct TDDFT calculation will be performed
Exchange: 0.1957 Hartree-Fock + 1.0000 wB97X-D3 + LR-HF
Correlation: 1.0000 wB97X-D3
Using SG-2 standard quadrature grid
Dispersion: Grimme D3
---------------------------------------------------
Iter Rts Conv Rts Left Ttl Dev Max Dev
---------------------------------------------------
Q-Chem fatal error occurred in module setman/rpa_dia.C, line 59:
Unable to diagonalize A-B
```

The input options read as follows:

```
$rem
BASIS def2-SVP
METHOD wB97X-D3
CIS_N_ROOTS 8
CIS_SINGLETS true
CIS_TRIPLETS false
RPA true
OMEGA 140
SOLVENT_METHOD = PCM
state_analysis true
GUI = 2
MAX_SCF_CYCLES = 1000
MEM_TOTAL = 7000
$end
$pcm
Theory CPCM
$end
$solvent
Dielectric 3
OpticalDielectric 3
$end
```

Is it possible to use a different algorithm for the digonalization of A-B matrices?

Thank you

Sara