Problem with WHILE Loop

I think the message is straightforward, that a loop must terminate before 10,000, while you have 65,536.

Where is this error coming from, Quartus? Is this code supposed to simulate or synthesize? If it's for simulation, then it would run in Modelsim. If you wanted to synthesize this, my guess is that this doesn't synthesize to a counter. (The endfile command looks like a simulation construct, unless you have some hardware for this?)

If you really want to synthesize a counter for reading, then make a signal that is the correct number of bits and just have it increment on each clock.