Where did my program go? The aftermath.

[Barry Dwyer]

This problem mysteriously disappeared.  I have no idea why.  It might have 
something to do with logging out and logging in again, but it wasn't the first 
time I tried that.

Prolog behaves as if it sends the compiled file to /dev/null.

192-168-1-112:expert barry$ uname -a
Darwin 192-168-1-112.tpgi.com.au 12.4.0 Darwin Kernel Version 12.4.0: Wed May  
1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 x86_64

configure was not used.
The same behaviour occurs with any source file on my MacBook Air, but all is 
well on my iMac desktop.


192-168-1-112:expert barry$ /opt/local/bin/gprolog
GNU Prolog 1.4.4 (64 bits)
Compiled Apr 23 2013, 17:26:17 with /opt/local/bin/gcc-apple-4.2
By Daniel Diaz
Copyright (C) 1999-2013 Daniel Diaz
| ?- [database].
compiling /Users/barry/Dropbox/SA&S/expert/database.pro for byte code...
/Users/barry/Dropbox/SA&S/expert/database.pro compiled, 70 lines read - 18597 
bytes written, 30 ms

(5 ms) yes
| ?- listing.

yes
| ?- subject(A,B,C,D,E).
uncaught exception: error(existence_error(procedure,subject/5),top_level/0)
| ?- halt.

Attempting to call any predicate in a compiled file fails.

Barry Dwyer
address@hidden