Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/MacNab02/BostonCollection.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3892-BostonCollection.ps) >>/Users/jc/w/tmp/Tune-3892-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/MacNab02/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
Form_38925.log 818 Log file, useful mostly for debugging
Tune-3892-BostonCollection.abc 157 ABC music file with the extracted tune(s)
Tune-3892-BostonCollection.ps 6 PostScript
Tune-3892-BostonCollection.txt 157 Plain-text file with the extracted tune(s)
Tune-3892-get.log 8738 Log file, useful mostly for debugging
Tune-38921-get.log 1304 Log file, useful mostly for debugging
Tune-38923-get.log 33547 Log file, useful mostly for debugging
Tune-38925-get.log 4937 Log file, useful mostly for debugging
Tune-38926-get.log 4516 Log file, useful mostly for debugging
These files should be available for 24 hours.