pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-23178-05_Labyrinth.ps) >>/Users/jc/w/tmp/Tune-23178-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1809/Cahusac_JC/05_Labyrinth.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-23178-05_Labyrinth.abc 931 ABC music file with the extracted tune(s)
Tune-23178-05_Labyrinth.ps 34288 PostScript
Tune-23178-05_Labyrinth.txt 931 Plain-text file with the extracted tune(s)
Tune-23178-get.log 4581 Log file, useful mostly for debugging
These files should be available for 24 hours.