Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MusiciansCompanionP1/Kerr_MM1-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3907-Kerr_MM1-V2.ps) >>/Users/jc/w/tmp/Tune-3907-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MusiciansCompanionP1/Kerr_MM1-V2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-3907-Kerr_MM1-V2.abc 164 ABC music file with the extracted tune(s)
Tune-3907-Kerr_MM1-V2.ps 6 PostScript
Tune-3907-Kerr_MM1-V2.txt 164 Plain-text file with the extracted tune(s)
Tune-3907-get.log 4181 Log file, useful mostly for debugging
Tune-39071-get.log 9376 Log file, useful mostly for debugging
Tune-39075-HibernianMuse-V1.abc 153 ABC music file with the extracted tune(s)
Tune-39075-HibernianMuse-V1.ps 6 PostScript
Tune-39075-HibernianMuse-V1.txt 153 Plain-text file with the extracted tune(s)
Tune-39075-get.log 4119 Log file, useful mostly for debugging
Tune-39076-get.log 62786 Log file, useful mostly for debugging
These files should be available for 24 hours.