pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-87685-20751_Butchers_Row.ps) >>/Users/jc/w/tmp/Tune-87685-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/20751_Butchers_Row.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-87685-20751_Butchers_Row.abc 650 ABC music file with the extracted tune(s)
Tune-87685-20751_Butchers_Row.ps 34843 PostScript
Tune-87685-20751_Butchers_Row.txt 650 Plain-text file with the extracted tune(s)
Tune-87685-get.log 12542 Log file, useful mostly for debugging
These files should be available for 24 hours.