pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-46764-Master.ps) >>/Users/jc/w/tmp/Tune-46764-get.log 2>&1" returned status 256
http://kiwifolk.com/dfc/abcweb/abcf/Master Melody Collection.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-46764-Master.abc 548 ABC music file with the extracted tune(s)
Tune-46764-Master.ps 38113 PostScript
Tune-46764-Master.txt 548 Plain-text file with the extracted tune(s)
Tune-46764-get.log 32744 Log file, useful mostly for debugging
These files should be available for 24 hours.