Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book22/Gow-CR-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6385-Gow-CR-abc1.ps) >>/Users/jc/w/tmp/Tune-6385-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book22/Gow-CR-abc1.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_63856.log 944 Log file, useful mostly for debugging
Tune-6385-Gow-CR-abc1.abc 150 ABC music file with the extracted tune(s)
Tune-6385-Gow-CR-abc1.ps 6 PostScript
Tune-6385-Gow-CR-abc1.txt 150 Plain-text file with the extracted tune(s)
Tune-6385-get.log 4095 Log file, useful mostly for debugging
Tune-63850-Round_Band_Book_of_Playford.abc 166 ABC music file with the extracted tune(s)
Tune-63850-Round_Band_Book_of_Playford.pdf 2217 Portable Data Format
Tune-63850-Round_Band_Book_of_Playford.ps 6 PostScript
Tune-63850-Round_Band_Book_of_Playford.txt 166 Plain-text file with the extracted tune(s)
Tune-63850-get.log 5387 Log file, useful mostly for debugging
Tune-63851-get.log 3989 Log file, useful mostly for debugging
Tune-63853-get.log 5104 Log file, useful mostly for debugging
Tune-63854-get.log 7645 Log file, useful mostly for debugging
Tune-63858-get.log 5369 Log file, useful mostly for debugging
Tune-63859-get.log 4511 Log file, useful mostly for debugging
These files should be available for 24 hours.