Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book21/24CountryDances_1765_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6559-24CountryDances_1765_Thompson.ps) >>/Users/jc/w/tmp/Tune-6559-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book21/24CountryDances_1765_Thompson.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_65594.log 161667 Log file, useful mostly for debugging
Tune-6559-24CountryDances_1765_Thompson.abc 168 ABC music file with the extracted tune(s)
Tune-6559-24CountryDances_1765_Thompson.ps 6 PostScript
Tune-6559-24CountryDances_1765_Thompson.txt 168 Plain-text file with the extracted tune(s)
Tune-6559-get.log 4479 Log file, useful mostly for debugging
Tune-65590-get.log 14856 Log file, useful mostly for debugging
Tune-65591-get.log 4602 Log file, useful mostly for debugging
Tune-65594-24CountryDances_1801_Preston.abc 167 ABC music file with the extracted tune(s)
Tune-65594-24CountryDances_1801_Preston.pdf 2217 Portable Data Format
Tune-65594-24CountryDances_1801_Preston.ps 6 PostScript
Tune-65594-24CountryDances_1801_Preston.txt 167 Plain-text file with the extracted tune(s)
Tune-65594-get.log 5418 Log file, useful mostly for debugging
Tune-65595-get.log 4740 Log file, useful mostly for debugging
Tune-65597-get.log 267746 Log file, useful mostly for debugging
Tune-65599-get.log 3618 Log file, useful mostly for debugging
These files should be available for 24 hours.