Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1803/cresc.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4477-cresc.ps) >>/Users/jc/w/tmp/Tune-4477-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1803/cresc.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_44773.log 1613057 Log file, useful mostly for debugging
Tune-4477-cresc.abc 142 ABC music file with the extracted tune(s)
Tune-4477-cresc.ps 6 PostScript
Tune-4477-cresc.txt 142 Plain-text file with the extracted tune(s)
Tune-4477-get.log 16202 Log file, useful mostly for debugging
Tune-44770-get.log 4495 Log file, useful mostly for debugging
Tune-44771-get.log 4326 Log file, useful mostly for debugging
Tune-44772-get.log 7697 Log file, useful mostly for debugging
Tune-44773-get.log 18779 Log file, useful mostly for debugging
Tune-44774-SouvenirDeVeniceHornpipe.abc 714 ABC music file with the extracted tune(s)
Tune-44774-SouvenirDeVeniceHornpipe.ps 45188 PostScript
Tune-44774-SouvenirDeVeniceHornpipe.txt 714 Plain-text file with the extracted tune(s)
Tune-44774-get.log 4911 Log file, useful mostly for debugging
Tune-44775-get.log 3512 Log file, useful mostly for debugging
These files should be available for 24 hours.