Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Potpourri/Kerr_MM4-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6045-Kerr_MM4-V2.ps) >>/Users/jc/w/tmp/Tune-6045-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Potpourri/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
Coll_60458.log 87390 Log file, useful mostly for debugging
Tune-6045-Kerr_MM4-V2.abc 153 ABC music file with the extracted tune(s)
Tune-6045-Kerr_MM4-V2.ps 6 PostScript
Tune-6045-Kerr_MM4-V2.txt 153 Plain-text file with the extracted tune(s)
Tune-6045-get.log 4117 Log file, useful mostly for debugging
Tune-60450-get.log 6015 Log file, useful mostly for debugging
Tune-60451-get.log 5624 Log file, useful mostly for debugging
Tune-60454-get.log 6871 Log file, useful mostly for debugging
Tune-60455-get.log 5172 Log file, useful mostly for debugging
Tune-60456-get.log 5496 Log file, useful mostly for debugging
Tune-60458-get.log 5446 Log file, useful mostly for debugging
Tune-60459-get.log 3232 Log file, useful mostly for debugging
These files should be available for 24 hours.