pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-60239-O-two_step.ps) >>/Users/jc/w/tmp/Tune-60239-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/thisoldtractor.com/O-two_step.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_60239.log 1676 Log file, useful mostly for debugging
Tune-60239-O-two_step.abc 706 ABC music file with the extracted tune(s)
Tune-60239-O-two_step.ps 37786 PostScript
Tune-60239-O-two_step.txt 706 Plain-text file with the extracted tune(s)
Tune-60239-get.log 4527 Log file, useful mostly for debugging
These files should be available for 24 hours.