Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1812/dance.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3867-dance.ps) >>/Users/jc/w/tmp/Tune-3867-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1812/dance.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_38674.log 925 Log file, useful mostly for debugging
Tune-3867-dance.abc 142 ABC music file with the extracted tune(s)
Tune-3867-dance.ps 6 PostScript
Tune-3867-dance.txt 142 Plain-text file with the extracted tune(s)
Tune-3867-get.log 3959 Log file, useful mostly for debugging
Tune-38672-get.log 4574 Log file, useful mostly for debugging
Tune-38675-Gow-CSR-abc1.abc 149 ABC music file with the extracted tune(s)
Tune-38675-Gow-CSR-abc1.ps 6 PostScript
Tune-38675-Gow-CSR-abc1.txt 149 Plain-text file with the extracted tune(s)
Tune-38675-get.log 4156 Log file, useful mostly for debugging
Tune-38676-FrolicThe_PLFD1701_440.abc 528 ABC music file with the extracted tune(s)
Tune-38676-FrolicThe_PLFD1701_440.ps 35504 PostScript
Tune-38676-FrolicThe_PLFD1701_440.txt 528 Plain-text file with the extracted tune(s)
Tune-38676-get.log 4805 Log file, useful mostly for debugging
Tune-38678-get.log 3282 Log file, useful mostly for debugging
These files should be available for 24 hours.