pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4731-William_Clarketunes.ps) >>/Users/jc/w/tmp/Tune-4731-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/maryhumphreys.co.uk/William_Clarketunes.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_47315.log 140387 Log file, useful mostly for debugging
Form_4731.log 865 Log file, useful mostly for debugging
Tune-4731-William_Clarketunes.abc 0 ABC music file with the extracted tune(s)
Tune-4731-William_Clarketunes.ps 6 PostScript
Tune-4731-William_Clarketunes.txt 0 Plain-text file with the extracted tune(s)
Tune-4731-get.log 37411 Log file, useful mostly for debugging
Tune-47316-get.log 194947 Log file, useful mostly for debugging
Tune-47318-get.log 3620 Log file, useful mostly for debugging
Tune-47319-get.log 3048 Log file, useful mostly for debugging
These files should be available for 24 hours.