[pd~] doesn't work on any platform
[pd~] help patch and clicking the messages in the demo patch, Purr Data freezes.
Tested on OSX 10.11.
Also tested on Ubuntu 14.04. Seems that the problem is the fact that Purr Data doesn't have the "-unique" flag--
[pd~] tries to spawn a new instance with that flag. Instead, the gui for the current instance receives an "open" event and treats it as if it's opening a new patch. However, the new instance just hangs there. But it doesn't freeze Purr Data as it does under OSX.
On Windows, it apparently doesn't create at all. (Haven't confirmed that, just read it on the Pd forum.)
I assume starting the new
[pd~] instance with the "-nogui" would work just fine, but I haven't tested that yet.