pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6556-171_Miss_Devons_Reel.ps) >>/Users/jc/w/tmp/Tune-6556-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/WilliamCampbell/10thBook/171_Miss_Devons_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
Coll_6556.log 2828536 Log file, useful mostly for debugging
Coll_65565.log 563040 Log file, useful mostly for debugging
Tune-6556-171_Miss_Devons_Reel.abc 1282 ABC music file with the extracted tune(s)
Tune-6556-171_Miss_Devons_Reel.ps 38738 PostScript
Tune-6556-171_Miss_Devons_Reel.txt 1282 Plain-text file with the extracted tune(s)
Tune-6556-get.log 4771 Log file, useful mostly for debugging
Tune-65561-get.log 1385 Log file, useful mostly for debugging
Tune-65565-get.log 9708 Log file, useful mostly for debugging
Tune-65566-get.log 1277 Log file, useful mostly for debugging
These files should be available for 24 hours.