I've got 2 classes, GCFacet and GCLapPlane and they have some methods where a facet will be passed to a method in lap and the other way around. Both the classes work fine independently but when I put in the methods that reference each other, I get errors saying Parse Issue, Expected a type. Everything is imported to everything else, if I comment out the offending methods then it all works fine otherwise. Any ideas? After some more searching I found an answer. I moved the #include to the xxx.m file and put @class xxx in the header. Here's some more info.