pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-96154-Sean_Henneghans_Polka.ps) >>/Users/jc/w/tmp/Tune-96154-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CuzTeahan/SliabhLuachroOnParade/Sean_Henneghans_Polka.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_96154.log 989 Log file, useful mostly for debugging
Tune-96154-Sean_Henneghans_Polka.abc 400 ABC music file with the extracted tune(s)
Tune-96154-Sean_Henneghans_Polka.ps 34039 PostScript
Tune-96154-Sean_Henneghans_Polka.txt 400 Plain-text file with the extracted tune(s)
Tune-96154-get.log 4886 Log file, useful mostly for debugging
These files should be available for 24 hours.