pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91630-MusiciansCompanionP1-1842-V2.ps) >>/Users/jc/w/tmp/Tune-91630-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP1/MusiciansCompanionP1-1842-V2.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_91630.log 264661 Log file, useful mostly for debugging
Tune-91630-MusiciansCompanionP1-1842-V2.abc 297574 ABC music file with the extracted tune(s)
Tune-91630-MusiciansCompanionP1-1842-V2.ps 2468291 PostScript
Tune-91630-MusiciansCompanionP1-1842-V2.txt 297574 Plain-text file with the extracted tune(s)
Tune-91630-get.log 228947 Log file, useful mostly for debugging
These files should be available for 24 hours.