Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1808/CDSS_CDoT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6740-CDSS_CDoT.ps) >>/Users/jc/w/tmp/Tune-6740-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1808/CDSS_CDoT.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-6740-CDSS_CDoT.abc 146 ABC music file with the extracted tune(s)
Tune-6740-CDSS_CDoT.ps 6 PostScript
Tune-6740-CDSS_CDoT.txt 146 Plain-text file with the extracted tune(s)
Tune-6740-get.log 4045 Log file, useful mostly for debugging
Tune-67401-get.log 5778 Log file, useful mostly for debugging
Tune-67403-24CountryDances_1767_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-67403-24CountryDances_1767_Thompson.ps 6 PostScript
Tune-67403-24CountryDances_1767_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-67403-get.log 4388 Log file, useful mostly for debugging
Tune-67409-FARNE_Anonymous2.abc 153 ABC music file with the extracted tune(s)
Tune-67409-FARNE_Anonymous2.pdf 2217 Portable Data Format
Tune-67409-FARNE_Anonymous2.ps 6 PostScript
Tune-67409-FARNE_Anonymous2.txt 153 Plain-text file with the extracted tune(s)
Tune-67409-get.log 9974 Log file, useful mostly for debugging
These files should be available for 24 hours.