Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book10/Kerr_MM4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8663-Kerr_MM4-V2.ps) >>/Users/jc/w/tmp/Tune-8663-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book10/Kerr_MM4-V2.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_86639.log 836 Log file, useful mostly for debugging
Tune-8663-Kerr_MM4-V2.abc 150 ABC music file with the extracted tune(s)
Tune-8663-Kerr_MM4-V2.ps 6 PostScript
Tune-8663-Kerr_MM4-V2.txt 150 Plain-text file with the extracted tune(s)
Tune-8663-get.log 4097 Log file, useful mostly for debugging
Tune-86632-get.log 4128 Log file, useful mostly for debugging
Tune-86634-get.log 4293 Log file, useful mostly for debugging
Tune-86635-get.log 4468 Log file, useful mostly for debugging
Tune-86636-get.log 4237 Log file, useful mostly for debugging
Tune-86638-get.log 4183 Log file, useful mostly for debugging
Tune-86639-get.log 8160 Log file, useful mostly for debugging
These files should be available for 24 hours.