Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Kerr_MM/24FavouriteDances_1783_Straight.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7316-24FavouriteDances_1783_Straight.ps) >>/Users/jc/w/tmp/Tune-7316-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr_MM/24FavouriteDances_1783_Straight.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_7316.log 287140 Log file, useful mostly for debugging
Coll_73162.log 282925 Log file, useful mostly for debugging
Coll_73164.log 288545 Log file, useful mostly for debugging
Coll_73167.log 284330 Log file, useful mostly for debugging
Coll_73168.log 137642 Log file, useful mostly for debugging
Tune-7316-24FavouriteDances_1783_Straight.abc 171 ABC music file with the extracted tune(s)
Tune-7316-24FavouriteDances_1783_Straight.ps 6 PostScript
Tune-7316-24FavouriteDances_1783_Straight.txt 171 Plain-text file with the extracted tune(s)
Tune-7316-get.log 4523 Log file, useful mostly for debugging
Tune-73160-get.log 5587 Log file, useful mostly for debugging
Tune-73162-Kerr_MM1-V1.abc 156 ABC music file with the extracted tune(s)
Tune-73162-Kerr_MM1-V1.ps 6 PostScript
Tune-73162-Kerr_MM1-V1.txt 156 Plain-text file with the extracted tune(s)
Tune-73162-get.log 4181 Log file, useful mostly for debugging
These files should be available for 24 hours.