Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1800/Remick.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4270-Remick.ps) >>/Users/jc/w/tmp/Tune-4270-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1800/Remick.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-4270-Remick.abc 143 ABC music file with the extracted tune(s)
Tune-4270-Remick.ps 6 PostScript
Tune-4270-Remick.txt 143 Plain-text file with the extracted tune(s)
Tune-4270-RoundO_PLFD1703_512.abc 613 ABC music file with the extracted tune(s)
Tune-4270-RoundO_PLFD1703_512.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-4270-RoundO_PLFD1703_512.ps 36327 PostScript
Tune-4270-RoundO_PLFD1703_512.txt 613 Plain-text file with the extracted tune(s)
Tune-4270-get.log 10043 Log file, useful mostly for debugging
Tune-42700-get.log 2904 Log file, useful mostly for debugging
Tune-42705-get.log 4002 Log file, useful mostly for debugging
Tune-42706-get.log 4032 Log file, useful mostly for debugging
These files should be available for 24 hours.