pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-56698-153_Good_King_Wenceslas.ps) >>/Users/jc/w/tmp/Tune-56698-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EverydaySongBook/153_Good_King_Wenceslas.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_56698.log 853 Log file, useful mostly for debugging
Tune-56698-153_Good_King_Wenceslas.abc 2045 ABC music file with the extracted tune(s)
Tune-56698-153_Good_King_Wenceslas.ps 39630 PostScript
Tune-56698-153_Good_King_Wenceslas.txt 2045 Plain-text file with the extracted tune(s)
Tune-56698-get.log 12073 Log file, useful mostly for debugging
These files should be available for 24 hours.