PCM failure - TOO MANY VERTICES IN TESSERA

[thomasmalcomson]

I have been having issues running QR-DFT calculations using PCM in Dalton2018 for some moderately sized complexes:

The input is currently:
**DALTON INPUT
.DIRECT
.RUN WAVE FUNCTIONS
.RUN RESPONSE
*PCM
.SOLVNT
WATER
.NEQRSP
*PCMCAV
**INTEGRAL
.NOSUP
.DIPLEN
**WAVE FUNCTIONS
.DFT
CAMB3LYP
*ORBITALS
.NOSUPSYM
.CMOMAX
1000
*OPTIMIZATION
.MAX MACRO ITERATIONS
50
.MAX MICRO ITERATIONS
50
**RESPONSE
.MAXRM
3000
*QUADRATIC
.TWO-PHOTON
.ROOTS
30
*END OF INPUT

For a complex of 56 atoms.
I have increased -MXSP- to 500 in the Dalton build, which solved the initial "too many spheres" error
However, for a number of the complexes I am now presented with:

TOO MANY VERTICES IN TESSERA: BYE BYE...

Can anyone suggest a cause of this error, and hopefully recommend a fix for this?
I have attached a sample output for one of the complexes in case that is of any assistance