Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book46/Gow-CSR4-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4378-Gow-CSR4-abc1.ps) >>/Users/jc/w/tmp/Tune-4378-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book46/Gow-CSR4-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_43780.log 860 Log file, useful mostly for debugging
Form_43788.log 816 Log file, useful mostly for debugging
Tune-4378-Gow-CSR4-abc1.abc 152 ABC music file with the extracted tune(s)
Tune-4378-Gow-CSR4-abc1.ps 6 PostScript
Tune-4378-Gow-CSR4-abc1.txt 152 Plain-text file with the extracted tune(s)
Tune-4378-get.log 4141 Log file, useful mostly for debugging
Tune-43781-get.log 8986 Log file, useful mostly for debugging
Tune-43784-get.log 4545 Log file, useful mostly for debugging
Tune-43787-get.log 3378 Log file, useful mostly for debugging
Tune-43789-get.log 8754 Log file, useful mostly for debugging
These files should be available for 24 hours.