Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/5Trad/v3tune.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3742-v3tune.ps) >>/Users/jc/w/tmp/Tune-3742-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/5Trad/v3tune.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_37423.log 164917 Log file, useful mostly for debugging
Coll_37427.log 604012 Log file, useful mostly for debugging
Tune-3742-get.log 8471 Log file, useful mostly for debugging
Tune-3742-v3tune.abc 144 ABC music file with the extracted tune(s)
Tune-3742-v3tune.ps 6 PostScript
Tune-3742-v3tune.txt 144 Plain-text file with the extracted tune(s)
Tune-37420-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.abc 187 ABC music file with the extracted tune(s)
Tune-37420-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.pdf 2217 Portable Data Format
Tune-37420-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.ps 6 PostScript
Tune-37420-Button_Whitaker_SelectionOfDancesReelsAndWaltzes_2.txt 187 Plain-text file with the extracted tune(s)
Tune-37420-get.log 10028 Log file, useful mostly for debugging
Tune-37422-get.log 7895 Log file, useful mostly for debugging
Tune-37423-get.log 1372 Log file, useful mostly for debugging
Tune-37424-get.log 12260 Log file, useful mostly for debugging
Tune-37426-get.log 4950 Log file, useful mostly for debugging
Tune-37427-get.log 4544 Log file, useful mostly for debugging
Tune-37428-get.log 4488 Log file, useful mostly for debugging
These files should be available for 24 hours.