pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1516-SliabhLuachroOnParade.ps) >>/Users/jc/w/tmp/Tune-1516-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CuzTeahan/SliabhLuachroOnParade.abc-orig

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_15165.log 0 Log file, useful mostly for debugging
Tune-1516-SliabhLuachroOnParade.abc 316 ABC music file with the extracted tune(s)
Tune-1516-SliabhLuachroOnParade.ps 34021 PostScript
Tune-1516-SliabhLuachroOnParade.txt 316 Plain-text file with the extracted tune(s)
Tune-1516-get.log 39184 Log file, useful mostly for debugging
These files should be available for 24 hours.