Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MMM2/AMHSI-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4417-AMHSI-abc2.ps) >>/Users/jc/w/tmp/Tune-4417-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MMM2/AMHSI-abc2.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_44172.log 856263 Log file, useful mostly for debugging
Coll_44175.log 2589007 Log file, useful mostly for debugging
Coll_44179.log 273090 Log file, useful mostly for debugging
Tune-4417-AMHSI-abc2.abc 147 ABC music file with the extracted tune(s)
Tune-4417-AMHSI-abc2.ps 6 PostScript
Tune-4417-AMHSI-abc2.txt 147 Plain-text file with the extracted tune(s)
Tune-4417-get.log 4060 Log file, useful mostly for debugging
Tune-44170-ThomasBraysCountryDances1699.abc 164 ABC music file with the extracted tune(s)
Tune-44170-ThomasBraysCountryDances1699.ps 6 PostScript
Tune-44170-ThomasBraysCountryDances1699.txt 164 Plain-text file with the extracted tune(s)
Tune-44170-get.log 4486 Log file, useful mostly for debugging
Tune-44175-get.log 1576 Log file, useful mostly for debugging
Tune-44179-get.log 4557 Log file, useful mostly for debugging
These files should be available for 24 hours.