Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1812/MoF.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5935-MoF.ps) >>/Users/jc/w/tmp/Tune-5935-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1812/MoF.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_59350.log 676120 Log file, useful mostly for debugging
Tune-5935-MoF.abc 140 ABC music file with the extracted tune(s)
Tune-5935-MoF.ps 6 PostScript
Tune-5935-MoF.txt 140 Plain-text file with the extracted tune(s)
Tune-5935-get.log 3915 Log file, useful mostly for debugging
Tune-59352-get.log 3112 Log file, useful mostly for debugging
Tune-59353-RobertBremner_CSRCD1.abc 157 ABC music file with the extracted tune(s)
Tune-59353-RobertBremner_CSRCD1.txt 157 Plain-text file with the extracted tune(s)
Tune-59353-get.log 3368 Log file, useful mostly for debugging
Tune-59354-get.log 5052 Log file, useful mostly for debugging
Tune-59355-get.log 4318 Log file, useful mostly for debugging
Tune-59359-get.log 4201 Log file, useful mostly for debugging
These files should be available for 24 hours.