A click on this menu-option results in a CALC COORDN loop prior to the bond-valence analysis.
The proposed valency and bond-valence sum are shown on the opening window.
Full details of the analysis can be found in the .lis and .lps files.
References:
I.D. Brown (2002) The Chemical Bond in Inorganic Chemistry - The Bond
Valence Model, Oxford University Press
Note:
The analysis results are tentative and based on an internal table
with contribution for atom pairs in various oxidation states. This table
is incomplete.