pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5939-Kerr_MM4-V2.ps) >>/Users/jc/w/tmp/Tune-5939-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM4/Kerr_MM4-V2.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-5939-Kerr_MM4-V2.abc 403 ABC music file with the extracted tune(s)
Tune-5939-Kerr_MM4-V2.ps 34913 PostScript
Tune-5939-Kerr_MM4-V2.txt 403 Plain-text file with the extracted tune(s)
Tune-5939-get.log 85057 Log file, useful mostly for debugging
Tune-59397-Thompson.abc 415 ABC music file with the extracted tune(s)
Tune-59397-Thompson.malt 1087 Musical Instrument Digital Interface, alternate name for midi format
Tune-59397-Thompson.mid 1087 Musical Instrument Digital interface, shortened name for midi format
Tune-59397-Thompson.midi 1087 Musical Instrument Digital Interface, electronic version of the tune(s)
Tune-59397-Thompson.txt 415 Plain-text file with the extracted tune(s)
Tune-59397-get.log 43989 Log file, useful mostly for debugging
These files should be available for 24 hours.