Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/SCAJMR/RobertPurdie_TomThumb.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8095-RobertPurdie_TomThumb.ps) >>/Users/jc/w/tmp/Tune-8095-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCAJMR/RobertPurdie_TomThumb.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-8095-RobertPurdie_TomThumb.abc 160 ABC music file with the extracted tune(s)
Tune-8095-RobertPurdie_TomThumb.ps 6 PostScript
Tune-8095-RobertPurdie_TomThumb.txt 160 Plain-text file with the extracted tune(s)
Tune-8095-get.log 4305 Log file, useful mostly for debugging
Tune-80952-get.log 1401 Log file, useful mostly for debugging
Tune-80955-get.log 4542 Log file, useful mostly for debugging
Tune-80956-get.log 1401 Log file, useful mostly for debugging
These files should be available for 24 hours.