pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5688-10251_Lochaber.ps) >>/Users/jc/w/tmp/Tune-5688-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/10251_Lochaber.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-5688-10251_Lochaber.abc 620 ABC music file with the extracted tune(s)
Tune-5688-10251_Lochaber.ps 35131 PostScript
Tune-5688-10251_Lochaber.txt 620 Plain-text file with the extracted tune(s)
Tune-5688-get.log 4413 Log file, useful mostly for debugging
Tune-56882-Phoenix.abc 349 ABC music file with the extracted tune(s)
Tune-56882-Phoenix.pdf 13935 Portable Data Format
Tune-56882-Phoenix.ps 33694 PostScript
Tune-56882-Phoenix.txt 349 Plain-text file with the extracted tune(s)
Tune-56882-get.log 5119 Log file, useful mostly for debugging
These files should be available for 24 hours.