Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book44/CDSS_CDoT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4236-CDSS_CDoT.ps) >>/Users/jc/w/tmp/Tune-4236-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book44/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-4236-CDSS_CDoT.abc 148 ABC music file with the extracted tune(s)
Tune-4236-CDSS_CDoT.ps 6 PostScript
Tune-4236-CDSS_CDoT.txt 148 Plain-text file with the extracted tune(s)
Tune-4236-get.log 4053 Log file, useful mostly for debugging
Tune-42360-get.log 5188 Log file, useful mostly for debugging
Tune-42362-get.log 5666 Log file, useful mostly for debugging
Tune-42366-get.log 5849 Log file, useful mostly for debugging
These files should be available for 24 hours.