Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book31/Gallini_NewColl44Cot2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4020-Gallini_NewColl44Cot2.ps) >>/Users/jc/w/tmp/Tune-4020-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book31/Gallini_NewColl44Cot2.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_4020.log 285735 Log file, useful mostly for debugging
Coll_40202.log 289950 Log file, useful mostly for debugging
Coll_40207.log 287140 Log file, useful mostly for debugging
Tune-4020-Gallini_NewColl44Cot2.abc 160 ABC music file with the extracted tune(s)
Tune-4020-Gallini_NewColl44Cot2.ps 6 PostScript
Tune-4020-Gallini_NewColl44Cot2.txt 160 Plain-text file with the extracted tune(s)
Tune-4020-get.log 4309 Log file, useful mostly for debugging
Tune-40200-get.log 4689 Log file, useful mostly for debugging
Tune-40205-get.log 5561 Log file, useful mostly for debugging
These files should be available for 24 hours.