Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1769/24CountryDances_1793_Preston.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7617-24CountryDances_1793_Preston.ps) >>/Users/jc/w/tmp/Tune-7617-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1769/24CountryDances_1793_Preston.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-7617-24CountryDances_1793_Preston.abc 165 ABC music file with the extracted tune(s)
Tune-7617-24CountryDances_1793_Preston.ps 6 PostScript
Tune-7617-24CountryDances_1793_Preston.txt 165 Plain-text file with the extracted tune(s)
Tune-7617-get.log 4440 Log file, useful mostly for debugging
Tune-76171-get.log 5225 Log file, useful mostly for debugging
Tune-76173-MMM1.abc 141 ABC music file with the extracted tune(s)
Tune-76173-MMM1.txt 141 Plain-text file with the extracted tune(s)
Tune-76173-get.log 3080 Log file, useful mostly for debugging
Tune-76174-SCD_Book49-V2.abc 150 ABC music file with the extracted tune(s)
Tune-76174-SCD_Book49-V2.ps 6 PostScript
Tune-76174-SCD_Book49-V2.txt 150 Plain-text file with the extracted tune(s)
Tune-76174-get.log 4058 Log file, useful mostly for debugging
Tune-76178-SCD_Book49-V1.abc 150 ABC music file with the extracted tune(s)
Tune-76178-SCD_Book49-V1.pdf 2217 Portable Data Format
Tune-76178-SCD_Book49-V1.ps 6 PostScript
Tune-76178-SCD_Book49-V1.txt 150 Plain-text file with the extracted tune(s)
Tune-76178-get.log 4973 Log file, useful mostly for debugging
These files should be available for 24 hours.