pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99033-21222_CHOEUR_DES_CHASSERUS.ps) >>/Users/jc/w/tmp/Tune-99033-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21222_CHOEUR_DES_CHASSERUS.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_99033.log 954 Log file, useful mostly for debugging
Tune-99033-21222_CHOEUR_DES_CHASSERUS.abc 1012 ABC music file with the extracted tune(s)
Tune-99033-21222_CHOEUR_DES_CHASSERUS.ps 45716 PostScript
Tune-99033-21222_CHOEUR_DES_CHASSERUS.txt 1012 Plain-text file with the extracted tune(s)
Tune-99033-get.log 8993 Log file, useful mostly for debugging
These files should be available for 24 hours.