pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-75829-Slides.ps) >>/Users/jc/w/tmp/Tune-75829-get.log 2>&1" returned status 256
http://cobb.ece.wisc.edu/irish/Slides.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
Tune-75829-Slides.abc 196 ABC music file with the extracted tune(s)
Tune-75829-Slides.ps 34033 PostScript
Tune-75829-Slides.txt 196 Plain-text file with the extracted tune(s)
Tune-75829-get.log 3996 Log file, useful mostly for debugging
These files should be available for 24 hours.