pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-58647-4015_Fair_Haired_Lassie.ps) >>/Users/jc/w/tmp/Tune-58647-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM4/4015_Fair_Haired_Lassie.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-58647-4015_Fair_Haired_Lassie.abc 0 ABC music file with the extracted tune(s)
Tune-58647-4015_Fair_Haired_Lassie.ps 0 PostScript
Tune-58647-4015_Fair_Haired_Lassie.txt 0 Plain-text file with the extracted tune(s)
Tune-58647-get.log 8187 Log file, useful mostly for debugging
These files should be available for 24 hours.