Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1759/Kilkenny_Hornpipe.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9796-Kilkenny_Hornpipe.ps) >>/Users/jc/w/tmp/Tune-9796-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1759/Kilkenny_Hornpipe.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-9796-Kilkenny_Hornpipe.abc 154 ABC music file with the extracted tune(s)
Tune-9796-Kilkenny_Hornpipe.ps 6 PostScript
Tune-9796-Kilkenny_Hornpipe.txt 154 Plain-text file with the extracted tune(s)
Tune-9796-get.log 4213 Log file, useful mostly for debugging
Tune-97961-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.abc 187 ABC music file with the extracted tune(s)
Tune-97961-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.ps 6 PostScript
Tune-97961-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.txt 187 Plain-text file with the extracted tune(s)
Tune-97961-DeilTakeTheWars_PLFD1698_374-001.svg 22769 Scalable Vector Graphics format
Tune-97961-DeilTakeTheWars_PLFD1698_374.abc 553 ABC music file with the extracted tune(s)
Tune-97961-DeilTakeTheWars_PLFD1698_374.txt 553 Plain-text file with the extracted tune(s)
Tune-97961-get.log 9531 Log file, useful mostly for debugging
These files should be available for 24 hours.