pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-86983-Bonny_Broom_1651_PLFD1_011_CP.ps) >>/Users/jc/w/tmp/Tune-86983-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/Bonny_Broom_1651_PLFD1_011_CP.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-86983-Bonny_Broom_1651_PLFD1_011_CP.abc 272 ABC music file with the extracted tune(s)
Tune-86983-Bonny_Broom_1651_PLFD1_011_CP.ps 32775 PostScript
Tune-86983-Bonny_Broom_1651_PLFD1_011_CP.txt 272 Plain-text file with the extracted tune(s)
Tune-86983-get.log 4826 Log file, useful mostly for debugging
These files should be available for 24 hours.