Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/abc/Scotland/program/20190114/QuietAndSnug.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9984-QuietAndSnug.ps) >>/Users/jc/w/tmp/Tune-9984-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/program/20190114/QuietAndSnug.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
Form_99845.log 770 Log file, useful mostly for debugging
Form_99849.log 732 Log file, useful mostly for debugging
Tune-9984-QuietAndSnug.abc 169 ABC music file with the extracted tune(s)
Tune-9984-QuietAndSnug.ps 6 PostScript
Tune-9984-QuietAndSnug.txt 169 Plain-text file with the extracted tune(s)
Tune-9984-get.log 4215 Log file, useful mostly for debugging
Tune-99846-Jenny_Dang_the_Weaver_BM-D-16-3.abc 789 ABC music file with the extracted tune(s)
Tune-99846-Jenny_Dang_the_Weaver_BM-D-16-3.ps 37262 PostScript
Tune-99846-Jenny_Dang_the_Weaver_BM-D-16-3.txt 789 Plain-text file with the extracted tune(s)
Tune-99846-get.log 4854 Log file, useful mostly for debugging
These files should be available for 24 hours.