Ignore formula on brew upgrade

Question

I want to do a brew upgrade and tell homebrew do not upgrade the erlang formula since the latest one does not work on my system.

Is it possible

Answer 1

You could upgrade erlang to the latest version but keep using the older working version with the brew commands versions and switch.

To list available versions use:

brew versions erlang

To switch between two installed versions (I'll presume you wanted erlang R14):

brew switch erlang R14B04