pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-62623-tune.ps) >>/Users/jc/w/tmp/Tune-62623-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP1/tune.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Sess-62623.log 9012 Log file, useful mostly for debugging
Tune-62623-get.log 10438 Log file, useful mostly for debugging
Tune-62623-tune.abc 416 ABC music file with the extracted tune(s)
Tune-62623-tune.ps 30878 PostScript
Tune-62623-tune.txt 416 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.