pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3674-842_Tarter.ps) >>/Users/jc/w/tmp/Tune-3674-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1779/Thompson/842_Tarter.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_36741.log 289950 Log file, useful mostly for debugging
Coll_36747.log 291355 Log file, useful mostly for debugging
Tune-3674-842_Tarter.abc 917 ABC music file with the extracted tune(s)
Tune-3674-842_Tarter.ps 34604 PostScript
Tune-3674-842_Tarter.txt 917 Plain-text file with the extracted tune(s)
Tune-3674-get.log 4456 Log file, useful mostly for debugging
Tune-36749-get.log 5752 Log file, useful mostly for debugging
These files should be available for 24 hours.