Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1804/AbrahamMackintosh.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4356-AbrahamMackintosh.ps) >>/Users/jc/w/tmp/Tune-4356-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1804/AbrahamMackintosh.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-4356-AbrahamMackintosh.abc 154 ABC music file with the extracted tune(s)
Tune-4356-AbrahamMackintosh.ps 6 PostScript
Tune-4356-AbrahamMackintosh.txt 154 Plain-text file with the extracted tune(s)
Tune-4356-get.log 4211 Log file, useful mostly for debugging
Tune-43561-get.log 1418 Log file, useful mostly for debugging
Tune-43564-24CountryDances_1782_Skillern.abc 166 ABC music file with the extracted tune(s)
Tune-43564-24CountryDances_1782_Skillern.ps 6 PostScript
Tune-43564-24CountryDances_1782_Skillern.txt 166 Plain-text file with the extracted tune(s)
Tune-43564-get.log 4394 Log file, useful mostly for debugging
Tune-43566-get.log 1440 Log file, useful mostly for debugging
Tune-43567-endo.abc 141 ABC music file with the extracted tune(s)
Tune-43567-endo.ps 6 PostScript
Tune-43567-endo.txt 141 Plain-text file with the extracted tune(s)
Tune-43567-get.log 3986 Log file, useful mostly for debugging
These files should be available for 24 hours.