pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35568-24_Thistle_Down.ps) >>/Users/jc/w/tmp/Tune-35568-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1813/Button_Whitaker/24_Thistle_Down.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-35568-24_Thistle_Down.abc 1093 ABC music file with the extracted tune(s)
Tune-35568-24_Thistle_Down.ps 34863 PostScript
Tune-35568-24_Thistle_Down.txt 1093 Plain-text file with the extracted tune(s)
Tune-35568-get.log 4659 Log file, useful mostly for debugging
These files should be available for 24 hours.