Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/_/24CountryDances_1770_Longman.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6139-24CountryDances_1770_Longman.ps) >>/Users/jc/w/tmp/Tune-6139-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/_/24CountryDances_1770_Longman.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_61393.log 282925 Log file, useful mostly for debugging
Coll_61394.log 360203 Log file, useful mostly for debugging
Coll_61399.log 292760 Log file, useful mostly for debugging
Tune-6139-24CountryDances_1770_Longman.abc 162 ABC music file with the extracted tune(s)
Tune-6139-24CountryDances_1770_Longman.ps 6 PostScript
Tune-6139-24CountryDances_1770_Longman.txt 162 Plain-text file with the extracted tune(s)
Tune-6139-get.log 8312 Log file, useful mostly for debugging
These files should be available for 24 hours.