pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3838-Dingle_Regatta.ps) >>/Users/jc/w/tmp/Tune-3838-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/gradcenter.marlboro.edu/abc/sessionTunes/Dingle_Regatta.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_38380.log 52904 Log file, useful mostly for debugging
Find_38386.log 1651 Log file, useful mostly for debugging
Tune-3838-Dingle_Regatta.abc 402 ABC music file with the extracted tune(s)
Tune-3838-Dingle_Regatta.ps 34527 PostScript
Tune-3838-Dingle_Regatta.txt 402 Plain-text file with the extracted tune(s)
Tune-3838-get.log 5419 Log file, useful mostly for debugging
These files should be available for 24 hours.