Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1792/CaledonianCountryDances.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7439-CaledonianCountryDances.ps) >>/Users/jc/w/tmp/Tune-7439-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1792/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_74397.log 648812 Log file, useful mostly for debugging
Coll_74398.log 148667 Log file, useful mostly for debugging
Tune-7439-CaledonianCountryDances.abc 160 ABC music file with the extracted tune(s)
Tune-7439-CaledonianCountryDances.ps 6 PostScript
Tune-7439-CaledonianCountryDances.txt 160 Plain-text file with the extracted tune(s)
Tune-7439-get.log 10527 Log file, useful mostly for debugging
Tune-74391-get.log 1231 Log file, useful mostly for debugging
Tune-74394-get.log 5029 Log file, useful mostly for debugging
Tune-74395-get.log 3394 Log file, useful mostly for debugging
Tune-74398-get.log 4070 Log file, useful mostly for debugging
These files should be available for 24 hours.