Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/march/RobertPurdie_TomThumb.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2356-RobertPurdie_TomThumb.ps) >>/Users/jc/w/tmp/Tune-2356-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/march/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
Coll_2356.log 734819 Log file, useful mostly for debugging
Coll_23561.log 252609 Log file, useful mostly for debugging
Coll_23566.log 473161 Log file, useful mostly for debugging
Coll_23567.log 280610 Log file, useful mostly for debugging
Form_23568.log 1009 Log file, useful mostly for debugging
Tune-2356-RobertPurdie_TomThumb.abc 159 ABC music file with the extracted tune(s)
Tune-2356-RobertPurdie_TomThumb.ps 6 PostScript
Tune-2356-RobertPurdie_TomThumb.txt 159 Plain-text file with the extracted tune(s)
Tune-2356-get.log 4303 Log file, useful mostly for debugging
Tune-23563-get.log 1494 Log file, useful mostly for debugging
These files should be available for 24 hours.