Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1750/CDSS_CDoT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3432-CDSS_CDoT.ps) >>/Users/jc/w/tmp/Tune-3432-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1750/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-3432-CDSS_CDoT.abc 146 ABC music file with the extracted tune(s)
Tune-3432-CDSS_CDoT.ps 6 PostScript
Tune-3432-CDSS_CDoT.txt 146 Plain-text file with the extracted tune(s)
Tune-3432-get.log 7640 Log file, useful mostly for debugging
Tune-34320-get.log 18655 Log file, useful mostly for debugging
Tune-34321-get.log 6907 Log file, useful mostly for debugging
Tune-34325-get.log 5933 Log file, useful mostly for debugging
Tune-34326-get.log 4284 Log file, useful mostly for debugging
Tune-34328-Thompson_V1_1751-1757_FTM.abc 163 ABC music file with the extracted tune(s)
Tune-34328-Thompson_V1_1751-1757_FTM.pdf 2215 Portable Data Format
Tune-34328-Thompson_V1_1751-1757_FTM.ps 6 PostScript
Tune-34328-Thompson_V1_1751-1757_FTM.txt 163 Plain-text file with the extracted tune(s)
Tune-34328-get.log 5323 Log file, useful mostly for debugging
Tune-34329-get.log 1398 Log file, useful mostly for debugging
These files should be available for 24 hours.