Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Stewart/Riddell/tmp/Tune-1170-1809.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4484-Tune-1170-1809.ps) >>/Users/jc/w/tmp/Tune-4484-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Stewart/Riddell/tmp/Tune-1170-1809.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_44841.log 916822 Log file, useful mostly for debugging
Coll_44849.log 461210 Log file, useful mostly for debugging
Form_44843.log 1022 Log file, useful mostly for debugging
Form_44844.log 1007 Log file, useful mostly for debugging
Form_44845.log 1865 Log file, useful mostly for debugging
Tune-4484-Tune-1170-1809.abc 166 ABC music file with the extracted tune(s)
Tune-4484-Tune-1170-1809.ps 6 PostScript
Tune-4484-Tune-1170-1809.txt 166 Plain-text file with the extracted tune(s)
Tune-4484-get.log 4238 Log file, useful mostly for debugging
These files should be available for 24 hours.