Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1810/JohnJohnson_ChoiceCollectionVol8-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9681-JohnJohnson_ChoiceCollectionVol8-V2.ps) >>/Users/jc/w/tmp/Tune-9681-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1810/JohnJohnson_ChoiceCollectionVol8-V2.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_96816.log 922 Log file, useful mostly for debugging
Tune-9681-JohnJohnson_ChoiceCollectionVol8-V2.abc 172 ABC music file with the extracted tune(s)
Tune-9681-JohnJohnson_ChoiceCollectionVol8-V2.ps 6 PostScript
Tune-9681-JohnJohnson_ChoiceCollectionVol8-V2.txt 172 Plain-text file with the extracted tune(s)
Tune-9681-get.log 4587 Log file, useful mostly for debugging
Tune-96811-031_Dermot.abc 766 ABC music file with the extracted tune(s)
Tune-96811-031_Dermot.ps 35685 PostScript
Tune-96811-031_Dermot.txt 766 Plain-text file with the extracted tune(s)
Tune-96811-get.log 4438 Log file, useful mostly for debugging
Tune-96819-043_Humpty_Dumpty-001.svg 14893 Scalable Vector Graphics format
Tune-96819-043_Humpty_Dumpty.abc 719 ABC music file with the extracted tune(s)
Tune-96819-043_Humpty_Dumpty.txt 719 Plain-text file with the extracted tune(s)
Tune-96819-get.log 4236 Log file, useful mostly for debugging
These files should be available for 24 hours.