Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/HUTB1/slurs.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5779-slurs.ps) >>/Users/jc/w/tmp/Tune-5779-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/HUTB1/slurs.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_57791.log 115827 Log file, useful mostly for debugging
Form_57796.log 935 Log file, useful mostly for debugging
Tune-5779-get.log 3963 Log file, useful mostly for debugging
Tune-5779-slurs.abc 143 ABC music file with the extracted tune(s)
Tune-5779-slurs.ps 6 PostScript
Tune-5779-slurs.txt 143 Plain-text file with the extracted tune(s)
Tune-57790-get.log 7019 Log file, useful mostly for debugging
Tune-57793-GentlemansMagazine.abc 161 ABC music file with the extracted tune(s)
Tune-57793-GentlemansMagazine.txt 161 Plain-text file with the extracted tune(s)
Tune-57793-get.log 6752 Log file, useful mostly for debugging
Tune-57794-Wilson_Harmony_4NCD_1812_V2.abc 168 ABC music file with the extracted tune(s)
Tune-57794-Wilson_Harmony_4NCD_1812_V2.txt 168 Plain-text file with the extracted tune(s)
Tune-57794-get.log 3512 Log file, useful mostly for debugging
Tune-57798-get.log 5427 Log file, useful mostly for debugging
Tune-57799-get.log 4019 Log file, useful mostly for debugging
These files should be available for 24 hours.