Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1785/HibernianMuse-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5466-HibernianMuse-V2.ps) >>/Users/jc/w/tmp/Tune-5466-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1785/HibernianMuse-V2.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_54667.log 296011 Log file, useful mostly for debugging
Tune-5466-HibernianMuse-V2.abc 153 ABC music file with the extracted tune(s)
Tune-5466-HibernianMuse-V2.ps 6 PostScript
Tune-5466-HibernianMuse-V2.txt 153 Plain-text file with the extracted tune(s)
Tune-5466-get.log 4188 Log file, useful mostly for debugging
Tune-54661-get.log 1499 Log file, useful mostly for debugging
Tune-54663-24CountryDances_1791_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-54663-24CountryDances_1791_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-54663-get.log 3524 Log file, useful mostly for debugging
Tune-54665-24CountryDances_1798_Bland_Weller.abc 170 ABC music file with the extracted tune(s)
Tune-54665-24CountryDances_1798_Bland_Weller.ps 6 PostScript
Tune-54665-24CountryDances_1798_Bland_Weller.txt 170 Plain-text file with the extracted tune(s)
Tune-54665-get.log 4593 Log file, useful mostly for debugging
These files should be available for 24 hours.