Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/EDM/BostonCollection.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7237-BostonCollection.ps) >>/Users/jc/w/tmp/Tune-7237-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EDM/BostonCollection.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_72378.log 450010 Log file, useful mostly for debugging
Coll_72379.log 511612 Log file, useful mostly for debugging
Tune-7237-BostonCollection.abc 152 ABC music file with the extracted tune(s)
Tune-7237-BostonCollection.ps 6 PostScript
Tune-7237-BostonCollection.txt 152 Plain-text file with the extracted tune(s)
Tune-7237-get.log 4188 Log file, useful mostly for debugging
Tune-72370-Ship_That_Never_Returned0_D.abc 1221 ABC music file with the extracted tune(s)
Tune-72370-Ship_That_Never_Returned0_D.ps 38580 PostScript
Tune-72370-Ship_That_Never_Returned0_D.txt 1221 Plain-text file with the extracted tune(s)
Tune-72370-get.log 4869 Log file, useful mostly for debugging
Tune-72371-get.log 4198 Log file, useful mostly for debugging
Tune-72374-get.log 2606 Log file, useful mostly for debugging
Tune-72375-get.log 3144 Log file, useful mostly for debugging
Tune-72378-get.log 4933 Log file, useful mostly for debugging
These files should be available for 24 hours.