Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/GftF/cont.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3450-cont.ps) >>/Users/jc/w/tmp/Tune-3450-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/GftF/cont.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_34500.log 2448196 Log file, useful mostly for debugging
Coll_34501.log 4949 Log file, useful mostly for debugging
Coll_34502.log 287885 Log file, useful mostly for debugging
Coll_34504.log 152493 Log file, useful mostly for debugging
Tune-3450-cont.abc 141 ABC music file with the extracted tune(s)
Tune-3450-cont.ps 6 PostScript
Tune-3450-cont.txt 141 Plain-text file with the extracted tune(s)
Tune-3450-get.log 3942 Log file, useful mostly for debugging
Tune-34500-get.log 68413 Log file, useful mostly for debugging
Tune-34503-get.log 7204 Log file, useful mostly for debugging
Tune-34504-get.log 5726 Log file, useful mostly for debugging
Tune-34508-get.log 3221 Log file, useful mostly for debugging
These files should be available for 24 hours.