Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book04/Gow-CSR2-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6656-Gow-CSR2-abc2.ps) >>/Users/jc/w/tmp/Tune-6656-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book04/Gow-CSR2-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
Tune-6656-Gow-CSR2-abc2.abc 152 ABC music file with the extracted tune(s)
Tune-6656-Gow-CSR2-abc2.ps 6 PostScript
Tune-6656-Gow-CSR2-abc2.txt 152 Plain-text file with the extracted tune(s)
Tune-6656-get.log 4137 Log file, useful mostly for debugging
Tune-66563-get.log 5498 Log file, useful mostly for debugging
Tune-66564-1153.abc 1177 ABC music file with the extracted tune(s)
Tune-66564-1153.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-66564-1153.ps 40204 PostScript
Tune-66564-1153.txt 1177 Plain-text file with the extracted tune(s)
Tune-66564-get.log 5730 Log file, useful mostly for debugging
Tune-66565-get.log 91668 Log file, useful mostly for debugging
Tune-66566-get.log 4654 Log file, useful mostly for debugging
These files should be available for 24 hours.