This is indeed fixed in IEM GUIs, but not in *gatom* labels.

IEM GUIs: can use # in labels and send/receive symbols

gatoms: # in labels and send/receive symbols are replaced by $. (Up to Pd 0.51-4 it worked in send/receive symbols at least...)

Em ter., 23 de nov. de 2021 às 14:59, Christof Ressi <info@christofressi.com> escreveu:

As a side note, we still can't have "#" in atom labels :-(

Can't confirm this, I can type "C#" or set it via label messages. Also tried "#-4" and it worked (tested in [cnv] and [bng]).