pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-56453-10512_Old_Zip_Coon.ps) >>/Users/jc/w/tmp/Tune-56453-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP1/10512_Old_Zip_Coon.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-56453-10512_Old_Zip_Coon.abc 688 ABC music file with the extracted tune(s)
Tune-56453-10512_Old_Zip_Coon.ps 36892 PostScript
Tune-56453-10512_Old_Zip_Coon.txt 688 Plain-text file with the extracted tune(s)
Tune-56453-get.log 13740 Log file, useful mostly for debugging
These files should be available for 24 hours.