pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6766-1043.ps) >>/Users/jc/w/tmp/Tune-6766-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1043=MacPhersons_Lament-abc2.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_6766.log 1315600 Log file, useful mostly for debugging
Coll_67663.log 1263615 Log file, useful mostly for debugging
Tune-6766-1043.abc 1806 ABC music file with the extracted tune(s)
Tune-6766-1043.ps 46206 PostScript
Tune-6766-1043.txt 1806 Plain-text file with the extracted tune(s)
Tune-6766-get.log 5278 Log file, useful mostly for debugging
Tune-67664-get.log 7368 Log file, useful mostly for debugging
These files should be available for 24 hours.