Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/CentColl/proto.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9340-proto.ps) >>/Users/jc/w/tmp/Tune-9340-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/CentColl/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-9340-get.log 3983 Log file, useful mostly for debugging
Tune-9340-proto.abc 146 ABC music file with the extracted tune(s)
Tune-9340-proto.ps 6 PostScript
Tune-9340-proto.txt 146 Plain-text file with the extracted tune(s)
Tune-93400-get.log 40233 Log file, useful mostly for debugging
Tune-93402-get.log 28936 Log file, useful mostly for debugging
Tune-93404-get.log 4400 Log file, useful mostly for debugging
Tune-93405-24CountryDances_1799_Preston.abc 167 ABC music file with the extracted tune(s)
Tune-93405-24CountryDances_1799_Preston.ps 6 PostScript
Tune-93405-24CountryDances_1799_Preston.txt 167 Plain-text file with the extracted tune(s)
Tune-93405-get.log 4502 Log file, useful mostly for debugging
These files should be available for 24 hours.