pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-866-Kerr_MM1-V2.ps) >>/Users/jc/w/tmp/Tune-866-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM1/Kerr_MM1-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
Coll_86612.log 261969 Log file, useful mostly for debugging
Coll_86616.log 254919 Log file, useful mostly for debugging
Coll_86628.log 305481 Log file, useful mostly for debugging
Coll_86630.log 149462 Log file, useful mostly for debugging
Coll_86635.log 261969 Log file, useful mostly for debugging
Coll_8665.log 260559 Log file, useful mostly for debugging
Coll_86651.log 130102 Log file, useful mostly for debugging
Coll_86658.log 137967 Log file, useful mostly for debugging
Coll_86659.log 281379 Log file, useful mostly for debugging
Coll_86673.log 273249 Log file, useful mostly for debugging
Coll_86677.log 266199 Log file, useful mostly for debugging
Coll_8668.log 257739 Log file, useful mostly for debugging
Coll_86691.log 261969 Log file, useful mostly for debugging
Coll_86698.log 259149 Log file, useful mostly for debugging
Coll_86699.log 273249 Log file, useful mostly for debugging
Form_866.log 851 Log file, useful mostly for debugging
Form_86604.log 901 Log file, useful mostly for debugging
Form_86614.log 826 Log file, useful mostly for debugging
Form_86625.log 861 Log file, useful mostly for debugging
Form_86632.log 816 Log file, useful mostly for debugging
Form_8664.log 843 Log file, useful mostly for debugging
Form_86652.log 822 Log file, useful mostly for debugging
Form_86671.log 831 Log file, useful mostly for debugging
Form_86680.log 858 Log file, useful mostly for debugging
Tune-866-Kerr_MM1-V2.abc 372 ABC music file with the extracted tune(s)
Tune-866-Kerr_MM1-V2.ps 35378 PostScript
Tune-866-Kerr_MM1-V2.txt 372 Plain-text file with the extracted tune(s)
Tune-866-get.log 9366 Log file, useful mostly for debugging
Tune-86611-get.log 7073 Log file, useful mostly for debugging
Tune-86614-get.log 5321 Log file, useful mostly for debugging
Tune-86617-get.log 9872 Log file, useful mostly for debugging
Tune-86620-get.log 2423 Log file, useful mostly for debugging
Tune-86623-get.log 11515 Log file, useful mostly for debugging
Tune-86623-makamu2.abc 3779 ABC music file with the extracted tune(s)
Tune-86623-makamu2.txt 3779 Plain-text file with the extracted tune(s)
Tune-86626-get.log 10409 Log file, useful mostly for debugging
Tune-86629-get.log 3019 Log file, useful mostly for debugging
Tune-8663-get.log 3496 Log file, useful mostly for debugging
Tune-86632-get.log 3924 Log file, useful mostly for debugging
Tune-86634-get.log 3387 Log file, useful mostly for debugging
Tune-86638-get.log 3769 Log file, useful mostly for debugging
Tune-86640-get.log 4087 Log file, useful mostly for debugging
Tune-86641-Anvil-A3-32-3.abc 613 ABC music file with the extracted tune(s)
Tune-86641-Anvil-A3-32-3.txt 613 Plain-text file with the extracted tune(s)
Tune-86641-get.log 6195 Log file, useful mostly for debugging
Tune-86647-get.log 4302 Log file, useful mostly for debugging
Tune-86648-get.log 3800 Log file, useful mostly for debugging
Tune-86648-oneill_dmoi.abc 483 ABC music file with the extracted tune(s)
Tune-86648-oneill_dmoi.malt 1139 Musical Instrument Digital Interface, alternate name for midi format
Tune-86648-oneill_dmoi.mid 1139 Musical Instrument Digital interface, shortened name for midi format
Tune-86648-oneill_dmoi.midi 1139 Musical Instrument Digital Interface, electronic version of the tune(s)
Tune-86648-oneill_dmoi.txt 483 Plain-text file with the extracted tune(s)
Tune-86652-get.log 3061 Log file, useful mostly for debugging
Tune-86653-get.log 1384 Log file, useful mostly for debugging
Tune-86656-get.log 3081 Log file, useful mostly for debugging
Tune-86659-get.log 2270 Log file, useful mostly for debugging
Tune-86664-get.log 3753 Log file, useful mostly for debugging
Tune-86669-get.log 8275 Log file, useful mostly for debugging
Tune-86670-b-001.svg 15961 Scalable Vector Graphics format
Tune-86670-b.abc 451 ABC music file with the extracted tune(s)
Tune-86670-b.txt 451 Plain-text file with the extracted tune(s)
Tune-86670-get.log 8455 Log file, useful mostly for debugging
Tune-86671-get.log 3029 Log file, useful mostly for debugging
Tune-86674-get.log 2996 Log file, useful mostly for debugging
Tune-86679-get.log 4688 Log file, useful mostly for debugging
Tune-86681-get.log 20724 Log file, useful mostly for debugging
Tune-86689-MrsForbesLeithR.abc 455 ABC music file with the extracted tune(s)
Tune-86689-MrsForbesLeithR.malt 2713 Musical Instrument Digital Interface, alternate name for midi format
Tune-86689-MrsForbesLeithR.mid 2713 Musical Instrument Digital interface, shortened name for midi format
Tune-86689-MrsForbesLeithR.midi 2713 Musical Instrument Digital Interface, electronic version of the tune(s)
Tune-86689-MrsForbesLeithR.txt 455 Plain-text file with the extracted tune(s)
Tune-86689-get.log 3712 Log file, useful mostly for debugging
Tune-86690-get.log 4442 Log file, useful mostly for debugging
Tune-86692-get.log 4070 Log file, useful mostly for debugging
Tune-86694-get.log 4594 Log file, useful mostly for debugging
Tune-86697-get.log 4455 Log file, useful mostly for debugging
These files should be available for 24 hours.