pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54877-playf.ps) >>/Users/jc/w/tmp/Tune-54877-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/bath.ac.uk/exxhf/music/playf.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
Form_54877.log 1605 Log file, useful mostly for debugging
Tune-54877-get.log 4270 Log file, useful mostly for debugging
Tune-54877-playf.abc 244 ABC music file with the extracted tune(s)
Tune-54877-playf.ps 33471 PostScript
Tune-54877-playf.txt 244 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.