Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/DftY/Straight.abc/1779"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-34385-1779.ps) >>/Users/jc/w/tmp/Tune-34385-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/Straight.abc/1779

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-34385-1779.abc 150 ABC music file with the extracted tune(s)
Tune-34385-1779.ps 6 PostScript
Tune-34385-1779.txt 150 Plain-text file with the extracted tune(s)
Tune-34385-30673_Circus-001.svg 15593 Scalable Vector Graphics format
Tune-34385-30673_Circus.abc 730 ABC music file with the extracted tune(s)
Tune-34385-30673_Circus.txt 730 Plain-text file with the extracted tune(s)
Tune-34385-get.log 8199 Log file, useful mostly for debugging
These files should be available for 24 hours.