Hey ShiftZ-
Can you explain what your define is attempting to do? Defines are usually used to substitute a section of code for something else. For example #define print(text) {if (GEngine) { GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Yellow, text); }} would allow you to use print(“Hello World”); in place of the GEngine line. In the case of your define, it seems to be saying “use PLACE(input) instead of input alone”. The best way to avoid the error would be to simply use int32 a; without using the PLACE define.