Fit curve into radius tolerance patch?


im trying to take a “jagged” curve and make it fit tolarance of 3inch radius.
im getting error results.
any idea where im failing?)
A= original
B= fit curve to smooth a bit
C= patch to fit specific curve results, just sections ?!?

RadiusReplace2.3dm (143.7 KB) (14.8 KB)

how can i make it a over 3" raduis tolarance curves ?
all i get is segments.

RadiusReplace2.1.3dm (274.8 KB) (14.1 KB)