pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-95819-DustyBobsJ.ps) >>/Users/jc/w/tmp/Tune-95819-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/500/DustyBobsJ.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_95819.log 273729 Log file, useful mostly for debugging
Tune-95819-DustyBobsJ.abc 572 ABC music file with the extracted tune(s)
Tune-95819-DustyBobsJ.ps 36183 PostScript
Tune-95819-DustyBobsJ.txt 572 Plain-text file with the extracted tune(s)
Tune-95819-get.log 6332 Log file, useful mostly for debugging
These files should be available for 24 hours.