Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/slide/ERM-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2409-ERM-V2.ps) >>/Users/jc/w/tmp/Tune-2409-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/slide/ERM-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
Coll_24090.log 457010 Log file, useful mostly for debugging
Coll_24094.log 270810 Log file, useful mostly for debugging
Coll_24095.log 465409 Log file, useful mostly for debugging
Coll_24097.log 306997 Log file, useful mostly for debugging
Tune-2409-ERM-V2.abc 144 ABC music file with the extracted tune(s)
Tune-2409-ERM-V2.ps 6 PostScript
Tune-2409-ERM-V2.txt 144 Plain-text file with the extracted tune(s)
Tune-2409-get.log 18950 Log file, useful mostly for debugging
Tune-24090-get.log 4074 Log file, useful mostly for debugging
Tune-24092-get.log 4850 Log file, useful mostly for debugging
Tune-24095-0067_the_Faithfull_Shepherd.abc 632 ABC music file with the extracted tune(s)
Tune-24095-0067_the_Faithfull_Shepherd.ps 34351 PostScript
Tune-24095-0067_the_Faithfull_Shepherd.txt 632 Plain-text file with the extracted tune(s)
Tune-24095-get.log 8909 Log file, useful mostly for debugging
Tune-24096-get.log 3165 Log file, useful mostly for debugging
Tune-24097-get.log 2795 Log file, useful mostly for debugging
These files should be available for 24 hours.