pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4938-DressedShip.ps) >>/Users/jc/w/tmp/Tune-4938-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/England/program/20100501/DressedShip.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_49381.log 252099 Log file, useful mostly for debugging
Coll_49382.log 145832 Log file, useful mostly for debugging
Coll_49387.log 124657 Log file, useful mostly for debugging
Coll_49389.log 127077 Log file, useful mostly for debugging
Form_49383.log 829 Log file, useful mostly for debugging
Tune-4938-DressedShip.abc 1236 ABC music file with the extracted tune(s)
Tune-4938-DressedShip.ps 38223 PostScript
Tune-4938-DressedShip.txt 1236 Plain-text file with the extracted tune(s)
Tune-4938-get.log 6159 Log file, useful mostly for debugging
These files should be available for 24 hours.