Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Gow/CSR-abc2.abc/CR4-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4181-CR4-abc1.ps) >>/Users/jc/w/tmp/Tune-4181-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CSR-abc2.abc/CR4-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
Coll_41816.log 311684 Log file, useful mostly for debugging
Tune-4181-CR4-abc1.abc 157 ABC music file with the extracted tune(s)
Tune-4181-CR4-abc1.ps 6 PostScript
Tune-4181-CR4-abc1.txt 157 Plain-text file with the extracted tune(s)
Tune-4181-get.log 4094 Log file, useful mostly for debugging
Tune-41810-get.log 3312 Log file, useful mostly for debugging
Tune-41811-get.log 5744 Log file, useful mostly for debugging
Tune-41812-24CountryDances_1792_Thompson.abc 179 ABC music file with the extracted tune(s)
Tune-41812-24CountryDances_1792_Thompson.ps 6 PostScript
Tune-41812-24CountryDances_1792_Thompson.txt 179 Plain-text file with the extracted tune(s)
Tune-41812-blank.abc 143 ABC music file with the extracted tune(s)
Tune-41812-blank.ps 6 PostScript
Tune-41812-blank.txt 143 Plain-text file with the extracted tune(s)
Tune-41812-get.log 8364 Log file, useful mostly for debugging
Tune-41813-get.log 3612 Log file, useful mostly for debugging
Tune-41814-get.log 3556 Log file, useful mostly for debugging
Tune-41819-get.log 3214 Log file, useful mostly for debugging
These files should be available for 24 hours.