Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/GlendarrochSDS/proto.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1661-proto.ps) >>/Users/jc/w/tmp/Tune-1661-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/GlendarrochSDS/proto.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_1661.log 145378 Log file, useful mostly for debugging
Form_16619.log 889 Log file, useful mostly for debugging
Tune-1661-get.log 4019 Log file, useful mostly for debugging
Tune-1661-proto.abc 152 ABC music file with the extracted tune(s)
Tune-1661-proto.ps 6 PostScript
Tune-1661-proto.txt 152 Plain-text file with the extracted tune(s)
Tune-16611-CharlesZeuner_TremontQuadrilles1.abc 171 ABC music file with the extracted tune(s)
Tune-16611-CharlesZeuner_TremontQuadrilles1.ps 6 PostScript
Tune-16611-CharlesZeuner_TremontQuadrilles1.txt 171 Plain-text file with the extracted tune(s)
Tune-16611-get.log 4584 Log file, useful mostly for debugging
Tune-16612-get.log 4379 Log file, useful mostly for debugging
Tune-16616-get.log 4275 Log file, useful mostly for debugging
These files should be available for 24 hours.