pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-30579-018_My_Sheep_I_Neglected.ps) >>/Users/jc/w/tmp/Tune-30579-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Chappell/018_My_Sheep_I_Neglected.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-30579-018_My_Sheep_I_Neglected.abc 961 ABC music file with the extracted tune(s)
Tune-30579-018_My_Sheep_I_Neglected.ps 40777 PostScript
Tune-30579-018_My_Sheep_I_Neglected.txt 961 Plain-text file with the extracted tune(s)
Tune-30579-get.log 5663 Log file, useful mostly for debugging
These files should be available for 24 hours.