pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2384-Chase_14.ps) >>/Users/jc/w/tmp/Tune-2384-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/corneymusers/Chase_14.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_23840.log 1928 Log file, useful mostly for debugging
Form_23841.log 857 Log file, useful mostly for debugging
Tune-2384-Chase_14.abc 398 ABC music file with the extracted tune(s)
Tune-2384-Chase_14.ps 38794 PostScript
Tune-2384-Chase_14.txt 398 Plain-text file with the extracted tune(s)
Tune-2384-get.log 4260 Log file, useful mostly for debugging
Tune-23844-get.log 4764 Log file, useful mostly for debugging
Tune-23848-get.log 4827 Log file, useful mostly for debugging
Tune-23849-get.log 5281 Log file, useful mostly for debugging
These files should be available for 24 hours.