Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/PWFT/Kerr_MM4-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7733-Kerr_MM4-V1.ps) >>/Users/jc/w/tmp/Tune-7733-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/PWFT/Kerr_MM4-V1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-7733-Kerr_MM4-V1.abc 148 ABC music file with the extracted tune(s)
Tune-7733-Kerr_MM4-V1.ps 6 PostScript
Tune-7733-Kerr_MM4-V1.txt 148 Plain-text file with the extracted tune(s)
Tune-7733-get.log 8226 Log file, useful mostly for debugging
Tune-77334-24NewCotillons_1770_Longman.abc 164 ABC music file with the extracted tune(s)
Tune-77334-24NewCotillons_1770_Longman.pdf 2217 Portable Data Format
Tune-77334-24NewCotillons_1770_Longman.ps 6 PostScript
Tune-77334-24NewCotillons_1770_Longman.txt 164 Plain-text file with the extracted tune(s)
Tune-77334-get.log 11595 Log file, useful mostly for debugging
Tune-77335-get.log 4142 Log file, useful mostly for debugging
Tune-77336-get.log 4243 Log file, useful mostly for debugging
Tune-77337-get.log 5563 Log file, useful mostly for debugging
These files should be available for 24 hours.