[node] object lost

Hi everyone!

I have a patcher, that includes a node-object and everything worked perfectly fine. But now when i open the patcher the node object has lost all settings and doesnt do anything...

I also get an error: "nodes: no such object"

I know what this error means, but i thought this could only happen to external objects...

In the object Explorer the node object still appears, but when i drop it in my patcher i get the same error message again and the object wont work at all.

So it seems to me, that somehow the node object is completely removed from my max installation.
I guess reinstalltion would fix the problem, but i dont want it to happen again...
So any ideas how this could happen or what to do against it?

Thanks!