Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/TremontQuadrilles/Playford_COST.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4497-Playford_COST.ps) >>/Users/jc/w/tmp/Tune-4497-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/TremontQuadrilles/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
Tune-4497-Playford_COST.abc 163 ABC music file with the extracted tune(s)
Tune-4497-Playford_COST.ps 6 PostScript
Tune-4497-Playford_COST.txt 163 Plain-text file with the extracted tune(s)
Tune-4497-get.log 8132 Log file, useful mostly for debugging
Tune-44972-get.log 4286 Log file, useful mostly for debugging
Tune-44975-get.log 4871 Log file, useful mostly for debugging
Tune-44978-get.log 5582 Log file, useful mostly for debugging
These files should be available for 24 hours.