"Source not found"

At first yes. Mainly I just wanted random numbers. I gave up trying to talk to clock or timer external functions, then gave up using stdlib.h and just put the actual snippet from it into my code. Trying to debug that, it says Source not found on a line that has nothing external on it, just basic operators like divide and multiply. Very odd. It's done this to at least one other student I know. Googling, the only official Altera answer I could find was 'port your project to Eclipse'!