Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/mazurka/CMCIT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3273-CMCIT.ps) >>/Users/jc/w/tmp/Tune-3273-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/mazurka/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-3273-CMCIT.abc 145 ABC music file with the extracted tune(s)
Tune-3273-CMCIT.ps 6 PostScript
Tune-3273-CMCIT.txt 145 Plain-text file with the extracted tune(s)
Tune-3273-get.log 8926 Log file, useful mostly for debugging
Tune-32733-get.log 4036 Log file, useful mostly for debugging
Tune-32736-1769_Bremner_SRCD.abc 154 ABC music file with the extracted tune(s)
Tune-32736-1769_Bremner_SRCD.txt 154 Plain-text file with the extracted tune(s)
Tune-32736-get.log 3312 Log file, useful mostly for debugging
Tune-32737-24CountryDances_1808_Goulding_AK.abc 168 ABC music file with the extracted tune(s)
Tune-32737-24CountryDances_1808_Goulding_AK.txt 168 Plain-text file with the extracted tune(s)
Tune-32737-get.log 3574 Log file, useful mostly for debugging
These files should be available for 24 hours.