Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/jig/BonAccordCollection.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1357-BonAccordCollection.ps) >>/Users/jc/w/tmp/Tune-1357-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/jig/BonAccordCollection.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_13574.log 632107 Log file, useful mostly for debugging
Coll_13577.log 450010 Log file, useful mostly for debugging
Coll_13578.log 275009 Log file, useful mostly for debugging
Tune-1357-BonAccordCollection.abc 155 ABC music file with the extracted tune(s)
Tune-1357-BonAccordCollection.ps 6 PostScript
Tune-1357-BonAccordCollection.txt 155 Plain-text file with the extracted tune(s)
Tune-1357-get.log 4249 Log file, useful mostly for debugging
Tune-13570-get.log 1716 Log file, useful mostly for debugging
Tune-13571-get.log 4843 Log file, useful mostly for debugging
Tune-13572-get.log 3474 Log file, useful mostly for debugging
Tune-13573-get.log 3960 Log file, useful mostly for debugging
Tune-13574-get.log 4786 Log file, useful mostly for debugging
Tune-13576-get.log 4121 Log file, useful mostly for debugging
These files should be available for 24 hours.