Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/FdML/CMCIT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-98949-CMCIT.ps) >>/Users/jc/w/tmp/Tune-98949-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/FdML/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
Tune-98949-Air_Tune_The-001.eps 35693 Encapsulated PostScript, for inclusion in PS files, HTML pages, etc.
Tune-98949-Air_Tune_The.abc 596 ABC music file with the extracted tune(s)
Tune-98949-Air_Tune_The.txt 596 Plain-text file with the extracted tune(s)
Tune-98949-CMCIT.abc 142 ABC music file with the extracted tune(s)
Tune-98949-CMCIT.ps 6 PostScript
Tune-98949-CMCIT.txt 142 Plain-text file with the extracted tune(s)
Tune-98949-get.log 7556 Log file, useful mostly for debugging
These files should be available for 24 hours.