Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Gow/CR1-abc1.abc/CR-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8240-CR-abc1.ps) >>/Users/jc/w/tmp/Tune-8240-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CR1-abc1.abc/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
Coll_82402.log 318685 Log file, useful mostly for debugging
Tune-8240-CR-abc1.abc 156 ABC music file with the extracted tune(s)
Tune-8240-CR-abc1.ps 6 PostScript
Tune-8240-CR-abc1.txt 156 Plain-text file with the extracted tune(s)
Tune-8240-get.log 8429 Log file, useful mostly for debugging
Tune-82400-get.log 22161 Log file, useful mostly for debugging
Tune-82401-get.log 5676 Log file, useful mostly for debugging
Tune-82405-get.log 5232 Log file, useful mostly for debugging
Tune-82406-get.log 1440 Log file, useful mostly for debugging
Tune-82407-get.log 4176 Log file, useful mostly for debugging
These files should be available for 24 hours.