pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4660-Levantines_Barrel-D-32-4.ps) >>/Users/jc/w/tmp/Tune-4660-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/hornpipe/Levantines_Barrel-D-32-4.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_46605.log 2740095 Log file, useful mostly for debugging
Tune-4660-Levantines_Barrel-D-32-4.abc 522 ABC music file with the extracted tune(s)
Tune-4660-Levantines_Barrel-D-32-4.ps 35548 PostScript
Tune-4660-Levantines_Barrel-D-32-4.txt 522 Plain-text file with the extracted tune(s)
Tune-4660-get.log 5297 Log file, useful mostly for debugging
Tune-46604-get.log 2255145 Log file, useful mostly for debugging
These files should be available for 24 hours.