pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-77218-proto.ps) >>/Users/jc/w/tmp/Tune-77218-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/proto.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-77218-get.log 4888 Log file, useful mostly for debugging
Tune-77218-proto.abc 672 ABC music file with the extracted tune(s)
Tune-77218-proto.ps 30866 PostScript
Tune-77218-proto.txt 672 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.