Multiwfn forum

Good morning! I am writing to report a bug I have encountered in version 3.8 of Multiwfn. When performing a topology analysis (specifically the search for critical points), the resulting output file, CPprop.txt, incorrectly names some of the critical points.

In my case, as the molecule interacts with a chloride anion, there are critical points between hydrogen atoms and the chlorine atom.

If the first atom listed is the hydrogen atom, the description begins as follows:

```
----------------   CP   246,     Type (3,-1)   ----------------
Connected atoms:    62(H   --   118(Cl
```

If the first atom listed is the chlorine atom, however, the description begins as follows:

```
----------------   CP   287,     Type (3,-1)   ----------------
Connected atoms:   118(C   --    21(H
```

I don’t know if it’s been fixed in the latest version; as I’m on macOS, I haven’t been able to try it yet.

Thank you so much for all your hard work!