pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68652-Green_Mountain_Petronella-G-32-3.ps) >>/Users/jc/w/tmp/Tune-68652-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/reel/Green_Mountain_Petronella-G-32-3.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_68652.log 720 Log file, useful mostly for debugging
Tune-68652-Green_Mountain_Petronella-G-32-3.abc 373 ABC music file with the extracted tune(s)
Tune-68652-Green_Mountain_Petronella-G-32-3.ps 34326 PostScript
Tune-68652-Green_Mountain_Petronella-G-32-3.txt 373 Plain-text file with the extracted tune(s)
Tune-68652-get.log 56178 Log file, useful mostly for debugging
These files should be available for 24 hours.