pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-70436-Margarets_Farewell_to_Devon-G,G,A,A-32-3.ps) >>/Users/jc/w/tmp/Tune-70436-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/session/ECD/waltz/Margarets_Farewell_to_Devon-G,G,A,A-32-3.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-70436-Margarets_Farewell_to_Devon-G,G,A,A-32-3.abc 653 ABC music file with the extracted tune(s)
Tune-70436-Margarets_Farewell_to_Devon-G,G,A,A-32-3.ps 34666 PostScript
Tune-70436-Margarets_Farewell_to_Devon-G,G,A,A-32-3.txt 653 Plain-text file with the extracted tune(s)
Tune-70436-get.log 6193 Log file, useful mostly for debugging
These files should be available for 24 hours.