I am playing with a nice guitar patch posted at lubbertdas.org. The patch works just fine in Pd-extended on my Mac but when I attempt to load it into an iOS application I get this error in the XCode console:

Pd Console: error: ... couldn't create "expr~ if ($v1==0, 0, (if ($v1<0, -1, 1)))"

Is there some compatibility problem with expr~ support in iOS?

-Allan

@Allan Ack. I am now seeing a bunch of stuff on the net regarding "expr is LGPL licensed". Good grief, seriously? :-!

-Allan

This issue has been discussed many times on the list and the license has now changed to GPL I think so it should be possible to use it in iOS. But since you have extended you have an older version of the object with its older license. Try downloading vanilla and use that instead.
I might be wrong though..

I think that the latest Vanilla still has expr under the LGPL, but that the upcoming release, which is dew out in a few weeks, will have it under the GPL.