Problems running WaterSwap on Sire 2023.0.1

[rei...@wanadoo.es]

Dear users,

When using Sire (installed through Anaconda on a Linux machine), I encountered some problems when attempting to run Waterswap calculations. I have used a topology file generated by CHARMM-GUI and after set-up the system, this comes up:

Adding system monitors...

Energies of this system at lambda == 0...
Traceback (most recent call last):
  File "/home/jgm54/.conda/envs/sire/share/Sire/scripts/waterswap.py", line 205, in <module>
    WSRC.run(params)
  File "/home/jgm54/.conda/envs/sire/lib/python3.9/site-packages/sire/legacy/Tools/__init__.py", line 175, in inner
    retval = func()
  File "/home/jgm54/.conda/envs/sire/lib/python3.9/site-packages/sire/legacy/Tools/WSRC.py", line 2908, in run
    (wsrc_system, wsrc_moves) = loadWSRC()
  File "/home/jgm54/.conda/envs/sire/lib/python3.9/site-packages/sire/legacy/Tools/WSRC.py", line 2748, in loadWSRC
    wsrc_system = mergeSystems(proteinsys, watersys, ligand_mol)
  File "/home/jgm54/.conda/envs/sire/lib/python3.9/site-packages/sire/legacy/Tools/WSRC.py", line 2625, in mergeSystems
    printEnergies(system.energies(), sys.stdout)
UserWarning: SireError::incomplete_code: NEED TO WRITE THE CODE FOR NON_STRICT SELECTION OF 1-4 PAIRS (call sire.error.get_last_error_details() for more info)

Could you help me, or any idea?

Bests wishes

Javier