the Chandy / Misra solution to Dining Philosophers Problem in picolisp
seems to be working now so the code is now at
http://logand.com/sw/phil.l for anybody interested.
The problem with the previous code was that once the hungry
philosopher handed over his dirty fork, he had to ask to get it back.
This was the message I thought was getting lost but it was not
generated in the first place.
Thanks Alex for your suggestions.