Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book37/Gow-CSR2-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2319-Gow-CSR2-abc2.ps) >>/Users/jc/w/tmp/Tune-2319-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book37/Gow-CSR2-abc2.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-2319-Gow-CSR2-abc2.abc 152 ABC music file with the extracted tune(s)
Tune-2319-Gow-CSR2-abc2.ps 6 PostScript
Tune-2319-Gow-CSR2-abc2.txt 152 Plain-text file with the extracted tune(s)
Tune-2319-get.log 4141 Log file, useful mostly for debugging
Tune-23190-get.log 7375 Log file, useful mostly for debugging
Tune-23191-get.log 3094 Log file, useful mostly for debugging
Tune-23194-Pringle.abc 150 ABC music file with the extracted tune(s)
Tune-23194-Pringle.txt 150 Plain-text file with the extracted tune(s)
Tune-23194-get.log 3164 Log file, useful mostly for debugging
Tune-23195-get.log 3170 Log file, useful mostly for debugging
Tune-23196-get.log 3898 Log file, useful mostly for debugging
Tune-23197-get.log 5537 Log file, useful mostly for debugging
Tune-23198-get.log 5283 Log file, useful mostly for debugging
These files should be available for 24 hours.