Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1762/proto.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3486-proto.ps) >>/Users/jc/w/tmp/Tune-3486-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1762/proto.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_34866.log 155203 Log file, useful mostly for debugging
Tune-3486-get.log 13967 Log file, useful mostly for debugging
Tune-3486-proto.abc 142 ABC music file with the extracted tune(s)
Tune-3486-proto.ps 6 PostScript
Tune-3486-proto.txt 142 Plain-text file with the extracted tune(s)
Tune-34860-EliasHowe_MusiciansCompanionP1-1842-V1.abc 176 ABC music file with the extracted tune(s)
Tune-34860-EliasHowe_MusiciansCompanionP1-1842-V1.ps 6 PostScript
Tune-34860-EliasHowe_MusiciansCompanionP1-1842-V1.txt 176 Plain-text file with the extracted tune(s)
Tune-34860-get.log 15796 Log file, useful mostly for debugging
Tune-34863-get.log 4483 Log file, useful mostly for debugging
Tune-34865-get.log 4535 Log file, useful mostly for debugging
Tune-34866-get.log 4384 Log file, useful mostly for debugging
Tune-34867-get.log 9261 Log file, useful mostly for debugging
Tune-34868-get.log 10499 Log file, useful mostly for debugging
Tune-34869-get.log 9608 Log file, useful mostly for debugging
These files should be available for 24 hours.