Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/AB/ThomasMarsden.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3652-ThomasMarsden.ps) >>/Users/jc/w/tmp/Tune-3652-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/AB/ThomasMarsden.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-3652-ThomasMarsden.abc 148 ABC music file with the extracted tune(s)
Tune-3652-ThomasMarsden.ps 6 PostScript
Tune-3652-ThomasMarsden.txt 148 Plain-text file with the extracted tune(s)
Tune-3652-get.log 4117 Log file, useful mostly for debugging
Tune-36521-get.log 2786 Log file, useful mostly for debugging
Tune-36523-get.log 9804 Log file, useful mostly for debugging
Tune-36525-get.log 2786 Log file, useful mostly for debugging
Tune-36527-get.log 3076 Log file, useful mostly for debugging
Tune-36527-tune.abc 141 ABC music file with the extracted tune(s)
Tune-36527-tune.txt 141 Plain-text file with the extracted tune(s)
Tune-36528-24CountryDances_1766_various.abc 165 ABC music file with the extracted tune(s)
Tune-36528-24CountryDances_1766_various.txt 165 Plain-text file with the extracted tune(s)
Tune-36528-get.log 3508 Log file, useful mostly for debugging
These files should be available for 24 hours.