Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Gow/CSR4-abc1.abc/CR4-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2178-CR4-abc2.ps) >>/Users/jc/w/tmp/Tune-2178-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow/CSR4-abc1.abc/CR4-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_2178.log 948 Log file, useful mostly for debugging
Tune-2178-CR4-abc2.abc 158 ABC music file with the extracted tune(s)
Tune-2178-CR4-abc2.ps 6 PostScript
Tune-2178-CR4-abc2.txt 158 Plain-text file with the extracted tune(s)
Tune-2178-get.log 4100 Log file, useful mostly for debugging
Tune-21780-get.log 4062 Log file, useful mostly for debugging
Tune-21781-get.log 3932 Log file, useful mostly for debugging
Tune-21783-get.log 4702 Log file, useful mostly for debugging
Tune-21784-get.log 5536 Log file, useful mostly for debugging
Tune-21785-get.log 4320 Log file, useful mostly for debugging
Tune-21786-get.log 5382 Log file, useful mostly for debugging
Tune-21787-get.log 4804 Log file, useful mostly for debugging
Tune-21788-cresc.abc 142 ABC music file with the extracted tune(s)
Tune-21788-cresc.txt 142 Plain-text file with the extracted tune(s)
Tune-21788-get.log 3092 Log file, useful mostly for debugging
These files should be available for 24 hours.