pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9497-B18.ps) >>/Users/jc/w/tmp/Tune-9497-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/AnselmLingnau/sets/B18.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
Tune-9497-B18.abc 0 ABC music file with the extracted tune(s)
Tune-9497-B18.ps 0 PostScript
Tune-9497-B18.txt 0 Plain-text file with the extracted tune(s)
Tune-9497-get.log 0 Log file, useful mostly for debugging
Tune-94971-get.log 2964449 Log file, useful mostly for debugging
Tune-94979-get.log 17196 Log file, useful mostly for debugging
These files should be available for 24 hours.