Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/FC/Gow-CR-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3681-Gow-CR-abc1.ps) >>/Users/jc/w/tmp/Tune-3681-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/FC/Gow-CR-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-3681-Gow-CR-abc1.abc 146 ABC music file with the extracted tune(s)
Tune-3681-Gow-CR-abc1.ps 6 PostScript
Tune-3681-Gow-CR-abc1.txt 146 Plain-text file with the extracted tune(s)
Tune-3681-MarketGirlsJig.abc 162 ABC music file with the extracted tune(s)
Tune-3681-MarketGirlsJig.txt 162 Plain-text file with the extracted tune(s)
Tune-3681-get.log 7383 Log file, useful mostly for debugging
Tune-36810-get.log 4334 Log file, useful mostly for debugging
Tune-36813-get.log 9749 Log file, useful mostly for debugging
Tune-36819-24CountryDances_1771_Thompson.abc 170 ABC music file with the extracted tune(s)
Tune-36819-24CountryDances_1771_Thompson.pdf 2217 Portable Data Format
Tune-36819-24CountryDances_1771_Thompson.ps 6 PostScript
Tune-36819-24CountryDances_1771_Thompson.txt 170 Plain-text file with the extracted tune(s)
Tune-36819-get.log 36956 Log file, useful mostly for debugging
These files should be available for 24 hours.