pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-79314-21193_.ps) >>/Users/jc/w/tmp/Tune-79314-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ERM/21193_.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-79314-10611_PRINCE_ALFREDS_HORNPIPE.abc 667 ABC music file with the extracted tune(s)
Tune-79314-10611_PRINCE_ALFREDS_HORNPIPE.ps 37927 PostScript
Tune-79314-10611_PRINCE_ALFREDS_HORNPIPE.txt 667 Plain-text file with the extracted tune(s)
Tune-79314-21193_.abc 33 ABC music file with the extracted tune(s)
Tune-79314-21193_.ps 6 PostScript
Tune-79314-21193_.txt 33 Plain-text file with the extracted tune(s)
Tune-79314-get.log 8766 Log file, useful mostly for debugging
These files should be available for 24 hours.