Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/mixed/slurs.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9871-slurs.ps) >>/Users/jc/w/tmp/Tune-9871-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/mixed/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
Form_9871.log 1055 Log file, useful mostly for debugging
Form_98717.log 843 Log file, useful mostly for debugging
Tune-9871-get.log 3963 Log file, useful mostly for debugging
Tune-9871-slurs.abc 143 ABC music file with the extracted tune(s)
Tune-9871-slurs.ps 6 PostScript
Tune-9871-slurs.txt 143 Plain-text file with the extracted tune(s)
Tune-98710-get.log 1393 Log file, useful mostly for debugging
Tune-98714-get.log 4220 Log file, useful mostly for debugging
Tune-98716-JohnJohnson_ChoiceCollectionVol8-V2.abc 173 ABC music file with the extracted tune(s)
Tune-98716-JohnJohnson_ChoiceCollectionVol8-V2.pdf 2217 Portable Data Format
Tune-98716-JohnJohnson_ChoiceCollectionVol8-V2.ps 6 PostScript
Tune-98716-JohnJohnson_ChoiceCollectionVol8-V2.txt 173 Plain-text file with the extracted tune(s)
Tune-98716-get.log 5613 Log file, useful mostly for debugging
Tune-98717-get.log 11702 Log file, useful mostly for debugging
These files should be available for 24 hours.