pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-26123-034_Devonshire.ps) >>/Users/jc/w/tmp/Tune-26123-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JeanWhite/100_Popular_HRJCD/034_Devonshire.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_26123.log 452810 Log file, useful mostly for debugging
Form_26123.log 1005 Log file, useful mostly for debugging
Tune-26123-034_Devonshire.abc 769 ABC music file with the extracted tune(s)
Tune-26123-034_Devonshire.ps 38175 PostScript
Tune-26123-034_Devonshire.txt 769 Plain-text file with the extracted tune(s)
Tune-26123-get.log 4659 Log file, useful mostly for debugging
These files should be available for 24 hours.