pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-25647-MusiciansCompanionP2-1843-V1.ps) >>/Users/jc/w/tmp/Tune-25647-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/MusiciansCompanionP2-1843-V1.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-25647-MusiciansCompanionP2-1843-V1.abc 348131 ABC music file with the extracted tune(s)
Tune-25647-MusiciansCompanionP2-1843-V1.ps 2526597 PostScript
Tune-25647-MusiciansCompanionP2-1843-V1.txt 348131 Plain-text file with the extracted tune(s)
Tune-25647-get.log 295179 Log file, useful mostly for debugging
These files should be available for 24 hours.