On 01/03/2013 10:22 AM, Jordi Guillaumes i Pons wrote: Let's hope that the ANF-10 trick is enough! :) I just made another compile WITHOUT ANF-10 and now I have got no missing symbols. This begins to look somehow as black magic. Those symbols have to be getting defined somewhere. I am unfamiliar with the TOPS-10 monitor build procedure; did you do the equivalent of a "make clean" first? I will give up by now. :-( -Dave -- Dave McGuire, AK4HZ New Kensington, PA