Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1779/Gow-CSR-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6966-Gow-CSR-abc2.ps) >>/Users/jc/w/tmp/Tune-6966-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1779/Gow-CSR-abc2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_69661.log 966 Log file, useful mostly for debugging
Form_69669.log 958 Log file, useful mostly for debugging
Tune-6966-Gow-CSR-abc2.abc 149 ABC music file with the extracted tune(s)
Tune-6966-Gow-CSR-abc2.ps 6 PostScript
Tune-6966-Gow-CSR-abc2.txt 149 Plain-text file with the extracted tune(s)
Tune-6966-get.log 4108 Log file, useful mostly for debugging
Tune-69660-get.log 1377 Log file, useful mostly for debugging
Tune-69662-get.log 4632 Log file, useful mostly for debugging
Tune-69664-20563_My_Long_Tail_Blue.abc 761 ABC music file with the extracted tune(s)
Tune-69664-20563_My_Long_Tail_Blue.txt 761 Plain-text file with the extracted tune(s)
Tune-69664-get.log 4971 Log file, useful mostly for debugging
These files should be available for 24 hours.