pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-76895-3203_the_Spell.ps) >>/Users/jc/w/tmp/Tune-76895-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/3203_the_Spell.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_76895.log 1273450 Log file, useful mostly for debugging
Tune-76895-3203_the_Spell.abc 679 ABC music file with the extracted tune(s)
Tune-76895-3203_the_Spell.ps 36883 PostScript
Tune-76895-3203_the_Spell.txt 679 Plain-text file with the extracted tune(s)
Tune-76895-get.log 4492 Log file, useful mostly for debugging
These files should be available for 24 hours.