Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book42/CharlesZeuner_TremontQuadrilles1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4535-CharlesZeuner_TremontQuadrilles1.ps) >>/Users/jc/w/tmp/Tune-4535-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book42/CharlesZeuner_TremontQuadrilles1.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_45351.log 676812 Log file, useful mostly for debugging
Coll_45353.log 627812 Log file, useful mostly for debugging
Coll_45355.log 937823 Log file, useful mostly for debugging
Tune-4535-CharlesZeuner_TremontQuadrilles1.abc 171 ABC music file with the extracted tune(s)
Tune-4535-CharlesZeuner_TremontQuadrilles1.ps 6 PostScript
Tune-4535-CharlesZeuner_TremontQuadrilles1.txt 171 Plain-text file with the extracted tune(s)
Tune-4535-get.log 9737 Log file, useful mostly for debugging
Tune-45350-get.log 1383 Log file, useful mostly for debugging
Tune-45352-get.log 9980 Log file, useful mostly for debugging
Tune-45355-get.log 14343 Log file, useful mostly for debugging
Tune-45358-get.log 4739 Log file, useful mostly for debugging
Tune-45359-get.log 4483 Log file, useful mostly for debugging
These files should be available for 24 hours.