pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-85072-Black_Nag_1657_PLFD1_116_CP.ps) >>/Users/jc/w/tmp/Tune-85072-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Playford/Black_Nag_1657_PLFD1_116_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
Form_85072.log 860 Log file, useful mostly for debugging
Tune-85072-Black_Nag_1657_PLFD1_116_CP.abc 404 ABC music file with the extracted tune(s)
Tune-85072-Black_Nag_1657_PLFD1_116_CP.ps 33781 PostScript
Tune-85072-Black_Nag_1657_PLFD1_116_CP.txt 404 Plain-text file with the extracted tune(s)
Tune-85072-get.log 5425 Log file, useful mostly for debugging
These files should be available for 24 hours.