Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1766/CaledonianCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2077-CaledonianCountryDances.ps) >>/Users/jc/w/tmp/Tune-2077-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1766/CaledonianCountryDances.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_20771.log 152583 Log file, useful mostly for debugging
Tune-2077-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-2077-CaledonianCountryDances.ps 6 PostScript
Tune-2077-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-2077-get.log 8575 Log file, useful mostly for debugging
Tune-20770-get.log 3320 Log file, useful mostly for debugging
Tune-20771-get.log 4691 Log file, useful mostly for debugging
Tune-20774-get.log 3162 Log file, useful mostly for debugging
Tune-20776-get.log 1233 Log file, useful mostly for debugging
Tune-20778-get.log 4100 Log file, useful mostly for debugging
These files should be available for 24 hours.