pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21897-Jigs1SevenStars.ps) >>/Users/jc/w/tmp/Tune-21897-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/contrib/Tunes/Jigs1SevenStars.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
Coll_21897.log 143412 Log file, useful mostly for debugging
Tune-21897-Jigs1SevenStars.abc 377 ABC music file with the extracted tune(s)
Tune-21897-Jigs1SevenStars.ps 38194 PostScript
Tune-21897-Jigs1SevenStars.txt 377 Plain-text file with the extracted tune(s)
Tune-21897-get.log 4452 Log file, useful mostly for debugging
These files should be available for 24 hours.