Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1769/Gow-CSR-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-84004-Gow-CSR-abc1.ps) >>/Users/jc/w/tmp/Tune-84004-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1769/Gow-CSR-abc1.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-84004-Gow-CSR-abc1.abc 149 ABC music file with the extracted tune(s)
Tune-84004-Gow-CSR-abc1.ps 6 PostScript
Tune-84004-Gow-CSR-abc1.txt 149 Plain-text file with the extracted tune(s)
Tune-84004-OldBourreeThe_PLFD1665_185.abc 353 ABC music file with the extracted tune(s)
Tune-84004-OldBourreeThe_PLFD1665_185.ps 32834 PostScript
Tune-84004-OldBourreeThe_PLFD1665_185.txt 353 Plain-text file with the extracted tune(s)
Tune-84004-get.log 9032 Log file, useful mostly for debugging
These files should be available for 24 hours.