Program to convert WFN-file to Molden
When a wfn-file is loaded into Multiwfn and one tries to convert it into a molden file via 100 &gt; 2 &gt; 6, it says Error: This function works only when input file contains basis function information.

So I guess, that as the wfn file lacks important information, it’s not easily possible to convert it into a molden file.