Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Tunes/BotCDaSS.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8353-BotCDaSS.ps) >>/Users/jc/w/tmp/Tune-8353-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Tunes/BotCDaSS.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Sess-83534.log 12725 Log file, useful mostly for debugging
Tune-8353-BotCDaSS.abc 146 ABC music file with the extracted tune(s)
Tune-8353-BotCDaSS.ps 6 PostScript
Tune-8353-BotCDaSS.txt 146 Plain-text file with the extracted tune(s)
Tune-8353-get.log 4026 Log file, useful mostly for debugging
Tune-83531-2017NEFFA_Italian.abc 917 ABC music file with the extracted tune(s)
Tune-83531-2017NEFFA_Italian.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-83531-2017NEFFA_Italian.ps 37201 PostScript
Tune-83531-2017NEFFA_Italian.txt 917 Plain-text file with the extracted tune(s)
Tune-83531-get.log 11775 Log file, useful mostly for debugging
Tune-83532-get.log 11193 Log file, useful mostly for debugging
Tune-83536-get.log 5163 Log file, useful mostly for debugging
Tune-83537-get.log 10439 Log file, useful mostly for debugging
Tune-83539-CharlesZeuner_TremontQuadrilles2.abc 169 ABC music file with the extracted tune(s)
Tune-83539-CharlesZeuner_TremontQuadrilles2.ps 6 PostScript
Tune-83539-CharlesZeuner_TremontQuadrilles2.txt 169 Plain-text file with the extracted tune(s)
Tune-83539-get.log 4576 Log file, useful mostly for debugging
These files should be available for 24 hours.