Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Roy_Goldring/SCD_RoyGoldring_14SocialDancesFor2000.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4955-SCD_RoyGoldring_14SocialDancesFor2000.ps) >>/Users/jc/w/tmp/Tune-4955-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Roy_Goldring/SCD_RoyGoldring_14SocialDancesFor2000.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_4955.log 356857 Log file, useful mostly for debugging
Coll_49550.log 285735 Log file, useful mostly for debugging
Coll_49551.log 140870 Log file, useful mostly for debugging
Find_49552.log 1527 Log file, useful mostly for debugging
Tune-4955-SCD_RoyGoldring_14SocialDancesFor2000.abc 182 ABC music file with the extracted tune(s)
Tune-4955-SCD_RoyGoldring_14SocialDancesFor2000.ps 6 PostScript
Tune-4955-SCD_RoyGoldring_14SocialDancesFor2000.txt 182 Plain-text file with the extracted tune(s)
Tune-4955-get.log 4679 Log file, useful mostly for debugging
These files should be available for 24 hours.