It works fine here... do you also have a full license of max? or just m4l? and do you have the latest ableton live version?

I have a full license of Max MSP and Jitter, and Ableton Live. Strangely enough, when I started the project today to give it another go, it worked instantly. Not sure what the problem was. Thanks for helping out, though! May you have a nice day.

Do you have 5.1.7 installed? nodes has been introduced in 5.1.6 (5.1.7 is highly recommended though).

Thanks, I do have 5.1.7 installed. It's fixed now, but I'm not sure what caused the problem to begin with.

It looks like you might have some nodes patcher/file in your search path, which might be causing some trouble.

I realize how old this post is, but I had an identical issue recently. Emmanuel's comment is spot on, but here it is in more specific language. For anyone else finding this post, make sure that there isn't a file in the same directory as your maxpat (or anywhere in Max's search path) called "nodes", "nodes.*", or similar. For me, it was "nodes.js", which I found surprising.

incidentally this goes for all max objects and files. Don't name your project "counter" or some such. It'll break things.