Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1771/Kerr_MM3-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1010-Kerr_MM3-V1.ps) >>/Users/jc/w/tmp/Tune-1010-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1771/Kerr_MM3-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-1010-Kerr_MM3-V1.abc 148 ABC music file with the extracted tune(s)
Tune-1010-Kerr_MM3-V1.ps 6 PostScript
Tune-1010-Kerr_MM3-V1.txt 148 Plain-text file with the extracted tune(s)
Tune-1010-get.log 4089 Log file, useful mostly for debugging
Tune-10101-EliasHowe_MusiciansCompanionP1-1842-V2.abc 175 ABC music file with the extracted tune(s)
Tune-10101-EliasHowe_MusiciansCompanionP1-1842-V2.ps 6 PostScript
Tune-10101-EliasHowe_MusiciansCompanionP1-1842-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-10101-get.log 4575 Log file, useful mostly for debugging
Tune-10103-get.log 1385 Log file, useful mostly for debugging
Tune-10105-get.log 5775 Log file, useful mostly for debugging
Tune-10106-Gow-CR-abc2.abc 148 ABC music file with the extracted tune(s)
Tune-10106-Gow-CR-abc2.pdf 2217 Portable Data Format
Tune-10106-Gow-CR-abc2.ps 6 PostScript
Tune-10106-Gow-CR-abc2.txt 148 Plain-text file with the extracted tune(s)
Tune-10106-get.log 4913 Log file, useful mostly for debugging
Tune-10107-20181_.abc 33 ABC music file with the extracted tune(s)
Tune-10107-20181_.ps 6 PostScript
Tune-10107-20181_.txt 33 Plain-text file with the extracted tune(s)
Tune-10107-get.log 10239 Log file, useful mostly for debugging
Tune-10108-get.log 5670 Log file, useful mostly for debugging
These files should be available for 24 hours.