Question on GSAS

[Riccardo Vivani]

Dear all,
in GSAS, L-S control editing option menu appears as follows
Enter L-S control editing option (<?>,A,B,C,D,E,J,L,P,X) >

By entering "V" (which is not in the list) a new convergence criterion is
asked:
Enter the new convergence criterion >

Can I have more information on this, and also the more appropriate answer to
that question?
Thank you in advance

Riccardo Vivani
Laboratiorio di Chimica Inorganica
Dipartimento di Chimica
Perugia - Italy