im trying to perform a binary replace but im having problems with it. %_SERVERS_CHANNELS_% is never in the same place and what is returned from $new_servers_channels will change as well.

im trying to search for the string %_SERVERS_CHANNELS_% in my &var and replace it with what ascii text is returned from $new_servers_channels


alias new_servers_channels { return foobar }

when i tried:
/breplace &var $+(%,_SERVERS_CHANNELS_,%) $new_servers_channels


i get this instead:

f_SERVERS_CHANNELS_f