pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-455-Metsa.ps) >>/Users/jc/w/tmp/Tune-455-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/Intl/waltz/Metsäkukkia-Gm,Am,Dm-96-4.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
Coll_45556.log 143412 Log file, useful mostly for debugging
Coll_45597.log 283119 Log file, useful mostly for debugging
Form_45540.log 802 Log file, useful mostly for debugging
Form_45547.log 784 Log file, useful mostly for debugging
Form_45585.log 746 Log file, useful mostly for debugging
Tune-455-Metsa.abc 2036 ABC music file with the extracted tune(s)
Tune-455-Metsa.ps 50368 PostScript
Tune-455-Metsa.txt 2036 Plain-text file with the extracted tune(s)
Tune-455-get.log 6482 Log file, useful mostly for debugging
Tune-45503-get.log 2863 Log file, useful mostly for debugging
Tune-45558-get.log 5186 Log file, useful mostly for debugging
Tune-45559-get.log 4393 Log file, useful mostly for debugging
Tune-45573-get.log 2941 Log file, useful mostly for debugging
Tune-45577-get.log 2877 Log file, useful mostly for debugging
Tune-45581-get.log 1519 Log file, useful mostly for debugging
Tune-4559-get.log 4789 Log file, useful mostly for debugging
These files should be available for 24 hours.