Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/abc/Scotland/program/20181005/CaptainBrucesJig.abc"
X:13 not found in http://john-chambers.us/~jc/music/abc/Scotland/program/20181005/CaptainBrucesJig.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57124-CaptainBrucesJig.ps) >>/Users/jc/w/tmp/Tune-57124-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/program/20181005/CaptainBrucesJig.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-57124-CaptainBrucesJig.abc 0 ABC music file with the extracted tune(s)
Tune-57124-CaptainBrucesJig.ps 6 PostScript
Tune-57124-CaptainBrucesJig.txt 0 Plain-text file with the extracted tune(s)
Tune-57124-get.log 4813 Log file, useful mostly for debugging
These files should be available for 24 hours.