Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/FtFIoD/CMCIT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3492-CMCIT.ps) >>/Users/jc/w/tmp/Tune-3492-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/FtFIoD/CMCIT.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_34924.log 150618 Log file, useful mostly for debugging
Coll_34926.log 275012 Log file, useful mostly for debugging
Tune-3492-CMCIT.abc 144 ABC music file with the extracted tune(s)
Tune-3492-CMCIT.ps 6 PostScript
Tune-3492-CMCIT.txt 144 Plain-text file with the extracted tune(s)
Tune-3492-get.log 3973 Log file, useful mostly for debugging
Tune-34922-get.log 1331 Log file, useful mostly for debugging
Tune-34923-20901_Cinderella_Sett_tune_1.abc 1000 ABC music file with the extracted tune(s)
Tune-34923-20901_Cinderella_Sett_tune_1.txt 1000 Plain-text file with the extracted tune(s)
Tune-34923-get.log 3691 Log file, useful mostly for debugging
Tune-34924-get.log 4535 Log file, useful mostly for debugging
Tune-34925-get.log 8934 Log file, useful mostly for debugging
Tune-34926-get.log 4615 Log file, useful mostly for debugging
Tune-34928-get.log 4537 Log file, useful mostly for debugging
Tune-34929-get.log 8312 Log file, useful mostly for debugging
These files should be available for 24 hours.