Encountered an interesting bug. I was strangely experiencing a problem where "Set Next Statement" would fail, with the instruction pointer set to zero. After some digging it turns out the problem was that the file i was stepping through was using backslashes in the path. This was because I happened to open that file using the file drop. This becomes a problem because all the file paths in the RDI NormalSourcePaths name map use forward slashes. So any calls to "rdi_name_map_lookup" using the backslashed path will fail. This is why "Set Next Statement" was failing.