What is the only condition that would cause the Insert operation of a dynamic data structure to return a “data structure full” error?

Question

I want to know where can I find some resources on this question, because, after researching for a day and half, I couldn't find information specific to my question. Can anyone help me answer my question? I know that dynamic data structures (such as linked lists) can expand the amount of nodes at runtime, but if that's the case, how could it ever return a "full error" message if has an unlimited amount of storage to get keep holding nodes inside of it?