Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1760/SCD_RoyGoldring_15SocialDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6783-SCD_RoyGoldring_15SocialDances.ps) >>/Users/jc/w/tmp/Tune-6783-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1760/SCD_RoyGoldring_15SocialDances.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-6783-24CountryDances_1776_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-6783-24CountryDances_1776_Thompson.pdf 2217 Portable Data Format
Tune-6783-24CountryDances_1776_Thompson.ps 6 PostScript
Tune-6783-24CountryDances_1776_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-6783-SCD_RoyGoldring_15SocialDances.abc 167 ABC music file with the extracted tune(s)
Tune-6783-SCD_RoyGoldring_15SocialDances.ps 6 PostScript
Tune-6783-SCD_RoyGoldring_15SocialDances.txt 167 Plain-text file with the extracted tune(s)
Tune-6783-get.log 9906 Log file, useful mostly for debugging
Tune-67830-SpiritOf1880Reel.abc 464 ABC music file with the extracted tune(s)
Tune-67830-SpiritOf1880Reel.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-67830-SpiritOf1880Reel.ps 36123 PostScript
Tune-67830-SpiritOf1880Reel.txt 464 Plain-text file with the extracted tune(s)
Tune-67830-get.log 5455 Log file, useful mostly for debugging
Tune-67837-get.log 4190 Log file, useful mostly for debugging
These files should be available for 24 hours.