Why can't I select individual atoms in Avogadro 1.2?

General Discussion
1

I can’t select individual atoms in Avogadro 12，My computer system is win11, AMD processor

2

@zwj Avogadro 1.2 is of a branch no longer maintained for multiple years. Check if your workflow is compatible with the current branch leading to Avogadro2; stable releases are available here, or on GitHub for WIndows, Mac, or Linux.

3

Thank you for your reply, after many attempts, Avogodra 1.2 can’t select the single atomic reason seems to be because it can’t be adapted with AMD’s graphics card. I want to use the auto-optimize feature in Avogodra 1.2, but it seems that in Avogodra 2 I didn’t find this feature

4

@zwj By

… can’t select single atom[s] …

in context of an optimization, do you refer to Avogadro’s freeze of individual atoms selected (extensions → calculate → freeze selected atoms; GUI of Avogadro 1.99)? So far, I considered the optimization of the whole (small organic) molecules with one of OpenBabel’s force fields (via extensions → openbabel → optimize geometry) as good enough either to depict the molecule as such, or for an export via Avogenerators for a subsequent computation (e.g., MOPAC/Gaussian) outside the program. Of course, your mileage may vary.