Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/abc2/Straight_Skillern.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4562-Straight_Skillern.ps) >>/Users/jc/w/tmp/Tune-4562-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/abc2/Straight_Skillern.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-4562-Straight_Skillern.abc 154 ABC music file with the extracted tune(s)
Tune-4562-Straight_Skillern.ps 6 PostScript
Tune-4562-Straight_Skillern.txt 154 Plain-text file with the extracted tune(s)
Tune-4562-get.log 4211 Log file, useful mostly for debugging
Tune-45622-Hamilton_HUTB1-1844-V1.abc 159 ABC music file with the extracted tune(s)
Tune-45622-Hamilton_HUTB1-1844-V1.pdf 2217 Portable Data Format
Tune-45622-Hamilton_HUTB1-1844-V1.ps 6 PostScript
Tune-45622-Hamilton_HUTB1-1844-V1.txt 159 Plain-text file with the extracted tune(s)
Tune-45622-get.log 5234 Log file, useful mostly for debugging
Tune-45628-24CountryDances_1793_Preston.abc 165 ABC music file with the extracted tune(s)
Tune-45628-24CountryDances_1793_Preston.ps 6 PostScript
Tune-45628-24CountryDances_1793_Preston.txt 165 Plain-text file with the extracted tune(s)
Tune-45628-get.log 4367 Log file, useful mostly for debugging
These files should be available for 24 hours.