pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3842-Quesnay.ps) >>/Users/jc/w/tmp/Tune-3842-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/england/Quesnay.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_38420.log 277305 Log file, useful mostly for debugging
Coll_38421.log 287140 Log file, useful mostly for debugging
Coll_38422.log 674924 Log file, useful mostly for debugging
Coll_38428.log 296975 Log file, useful mostly for debugging
Tune-3842-Quesnay.abc 1133 ABC music file with the extracted tune(s)
Tune-3842-Quesnay.ps 37983 PostScript
Tune-3842-Quesnay.txt 1133 Plain-text file with the extracted tune(s)
Tune-3842-get.log 5658 Log file, useful mostly for debugging
Tune-38428-get.log 5795 Log file, useful mostly for debugging
These files should be available for 24 hours.