Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/TremontQuadrilles/CMCIT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1827-CMCIT.ps) >>/Users/jc/w/tmp/Tune-1827-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/TremontQuadrilles/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
Form_18275.log 978 Log file, useful mostly for debugging
Form_18277.log 1217 Log file, useful mostly for debugging
Tune-1827-CMCIT.abc 155 ABC music file with the extracted tune(s)
Tune-1827-CMCIT.ps 6 PostScript
Tune-1827-CMCIT.txt 155 Plain-text file with the extracted tune(s)
Tune-1827-get.log 4037 Log file, useful mostly for debugging
Tune-18271-get.log 6606 Log file, useful mostly for debugging
Tune-18273-get.log 6643 Log file, useful mostly for debugging
Tune-18274-get.log 5085 Log file, useful mostly for debugging
Tune-18275-DanielWright_ECPMH.abc 160 ABC music file with the extracted tune(s)
Tune-18275-DanielWright_ECPMH.ps 6 PostScript
Tune-18275-DanielWright_ECPMH.txt 160 Plain-text file with the extracted tune(s)
Tune-18275-get.log 4187 Log file, useful mostly for debugging
Tune-18276-get.log 4739 Log file, useful mostly for debugging
Tune-18279-get.log 4911 Log file, useful mostly for debugging
These files should be available for 24 hours.