I don’t know whether this is a bug with Avogadro or Psi4 generate a wrong fchk format.
I can’t compare it with Gaussian fchk because I don’t have it.
Environment Information
Avogadro version: 1.2.0
Operating system and version:macOS 10.14(18A391)
Expected Behavior
Rendering Orbitals works well
The fchk file on this site works well in my Environment.
http://www.lct.jussieu.fr/manuels/Gaussian98/show/mogvcm001.htm
Actual Behavior
Avogadro only displays the molecule but doesn’t show orbital nor orbital energy.
Steps to Reproduce
This is the fchk file of CH4 from Psi4