pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-27221-11241.ps) >>/Users/jc/w/tmp/Tune-27221-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP1/11241=Marseilles_Hymn-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_27221.log 468210 Log file, useful mostly for debugging
Tune-27221-11241.abc 3860 ABC music file with the extracted tune(s)
Tune-27221-11241.ps 63719 PostScript
Tune-27221-11241.txt 3860 Plain-text file with the extracted tune(s)
Tune-27221-get.log 8581 Log file, useful mostly for debugging
These files should be available for 24 hours.