Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1750/Playford_COST.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2003-Playford_COST.ps) >>/Users/jc/w/tmp/Tune-2003-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1750/Playford_COST.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_20034.log 148651 Log file, useful mostly for debugging
Tune-2003-Playford_COST.abc 150 ABC music file with the extracted tune(s)
Tune-2003-Playford_COST.ps 6 PostScript
Tune-2003-Playford_COST.txt 150 Plain-text file with the extracted tune(s)
Tune-2003-get.log 4127 Log file, useful mostly for debugging
Tune-20030-get.log 1220 Log file, useful mostly for debugging
Tune-20031-get.log 7891 Log file, useful mostly for debugging
Tune-20031-tune.abc 142 ABC music file with the extracted tune(s)
Tune-20031-tune.ps 6 PostScript
Tune-20031-tune.txt 142 Plain-text file with the extracted tune(s)
Tune-20032-get.log 3940 Log file, useful mostly for debugging
Tune-20037-get.log 8696 Log file, useful mostly for debugging
These files should be available for 24 hours.