Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/SelectionOfDancesReelsAndWaltzes/AMHSI-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5892-AMHSI-abc1.ps) >>/Users/jc/w/tmp/Tune-5892-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SelectionOfDancesReelsAndWaltzes/AMHSI-abc1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-5892-AMHSI-abc1.abc 175 ABC music file with the extracted tune(s)
Tune-5892-AMHSI-abc1.ps 6 PostScript
Tune-5892-AMHSI-abc1.txt 175 Plain-text file with the extracted tune(s)
Tune-5892-get.log 8766 Log file, useful mostly for debugging
Tune-58920-get.log 7614 Log file, useful mostly for debugging
Tune-58921-get.log 4070 Log file, useful mostly for debugging
Tune-58922-get.log 10810 Log file, useful mostly for debugging
Tune-58923-get.log 10375 Log file, useful mostly for debugging
Tune-58926-get.log 14196 Log file, useful mostly for debugging
Tune-58927-get.log 3890 Log file, useful mostly for debugging
Tune-58929-get.log 6644 Log file, useful mostly for debugging
These files should be available for 24 hours.