Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book45/SocialDances2002.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7699-SocialDances2002.ps) >>/Users/jc/w/tmp/Tune-7699-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book45/SocialDances2002.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-7699-SocialDances2002.abc 155 ABC music file with the extracted tune(s)
Tune-7699-SocialDances2002.ps 6 PostScript
Tune-7699-SocialDances2002.txt 155 Plain-text file with the extracted tune(s)
Tune-7699-get.log 4206 Log file, useful mostly for debugging
Tune-76991-get.log 4614 Log file, useful mostly for debugging
Tune-76992-get.log 5082 Log file, useful mostly for debugging
Tune-76993-dance.abc 144 ABC music file with the extracted tune(s)
Tune-76993-dance.txt 144 Plain-text file with the extracted tune(s)
Tune-76993-get.log 3110 Log file, useful mostly for debugging
Tune-76995-get.log 4584 Log file, useful mostly for debugging
Tune-76999-get.log 4732 Log file, useful mostly for debugging
These files should be available for 24 hours.