Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Gow4/24CountryDances_1802_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6183-24CountryDances_1802_Thompson.ps) >>/Users/jc/w/tmp/Tune-6183-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow4/24CountryDances_1802_Thompson.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-6183-24CountryDances_1802_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-6183-24CountryDances_1802_Thompson.ps 6 PostScript
Tune-6183-24CountryDances_1802_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-6183-get.log 4465 Log file, useful mostly for debugging
Tune-61834-get.log 3696 Log file, useful mostly for debugging
Tune-61837-MMM1.abc 144 ABC music file with the extracted tune(s)
Tune-61837-MMM1.pdf 2217 Portable Data Format
Tune-61837-MMM1.ps 6 PostScript
Tune-61837-MMM1.txt 144 Plain-text file with the extracted tune(s)
Tune-61837-get.log 4722 Log file, useful mostly for debugging
These files should be available for 24 hours.