Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/jpg/Urbani_Liston_1800.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2639-Urbani_Liston_1800.ps) >>/Users/jc/w/tmp/Tune-2639-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/jpg/Urbani_Liston_1800.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_26396.log 822 Log file, useful mostly for debugging
Tune-2639-Urbani_Liston_1800.abc 154 ABC music file with the extracted tune(s)
Tune-2639-Urbani_Liston_1800.ps 6 PostScript
Tune-2639-Urbani_Liston_1800.txt 154 Plain-text file with the extracted tune(s)
Tune-2639-get.log 9743 Log file, useful mostly for debugging
Tune-26392-get.log 8033 Log file, useful mostly for debugging
Tune-26396-CTftF.abc 148 ABC music file with the extracted tune(s)
Tune-26396-CTftF.pdf 2217 Portable Data Format
Tune-26396-CTftF.ps 6 PostScript
Tune-26396-CTftF.txt 148 Plain-text file with the extracted tune(s)
Tune-26396-get.log 4775 Log file, useful mostly for debugging
These files should be available for 24 hours.