I can't explain it, but sometimes $0 didn't work for me, I think as the name of an array maybe? I wanted to have multiple instances of a sampler subpatch, and each had an array inside, but I had to rename each instance manually, because pd didn't seem to understand the $0 in this case.
~David
geiger wrote:
sl and rl stand for sendlocal and receivelocal, two externals I wrote at a time when there was no $0 mechanism available.
Now that you can use $0 there is probably no need for them anymore.
Günter