pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99528-NorthernRoots.ps) >>/Users/jc/w/tmp/Tune-99528-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scand/NorthernRoots.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-99528-NorthernRoots.abc 857 ABC music file with the extracted tune(s)
Tune-99528-NorthernRoots.ps 37763 PostScript
Tune-99528-NorthernRoots.txt 857 Plain-text file with the extracted tune(s)
Tune-99528-get.log 23450 Log file, useful mostly for debugging
These files should be available for 24 hours.