Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Tweed1/proto.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3848-proto.ps) >>/Users/jc/w/tmp/Tune-3848-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Tweed1/proto.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-3848-get.log 3975 Log file, useful mostly for debugging
Tune-3848-proto.abc 144 ABC music file with the extracted tune(s)
Tune-3848-proto.ps 6 PostScript
Tune-3848-proto.txt 144 Plain-text file with the extracted tune(s)
Tune-38480-get.log 4660 Log file, useful mostly for debugging
Tune-38483-get.log 1231 Log file, useful mostly for debugging
Tune-38484-get.log 1564 Log file, useful mostly for debugging
Tune-38487-Goulding_SSEIFA_v1.abc 155 ABC music file with the extracted tune(s)
Tune-38487-Goulding_SSEIFA_v1.txt 155 Plain-text file with the extracted tune(s)
Tune-38487-get.log 3328 Log file, useful mostly for debugging
Tune-38488-get.log 5263 Log file, useful mostly for debugging
These files should be available for 24 hours.