pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41581-CFD_Vol2.ps) >>/Users/jc/w/tmp/Tune-41581-get.log 2>&1" returned status 256
http://fifedrum.org/resources/abc/CFD_Vol2.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-41581-CFD_Vol2.abc 1154 ABC music file with the extracted tune(s)
Tune-41581-CFD_Vol2.ps 44082 PostScript
Tune-41581-CFD_Vol2.txt 1154 Plain-text file with the extracted tune(s)
Tune-41581-get.log 4369 Log file, useful mostly for debugging
These files should be available for 24 hours.