pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-65589-272_Mrs_Dr_Stewarts_Reel.ps) >>/Users/jc/w/tmp/Tune-65589-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/WilliamChristie/272_Mrs_Dr_Stewarts_Reel.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-65589-272_Mrs_Dr_Stewarts_Reel.abc 967 ABC music file with the extracted tune(s)
Tune-65589-272_Mrs_Dr_Stewarts_Reel.ps 37856 PostScript
Tune-65589-272_Mrs_Dr_Stewarts_Reel.txt 967 Plain-text file with the extracted tune(s)
Tune-65589-get.log 4819 Log file, useful mostly for debugging
These files should be available for 24 hours.