route follow pins inside a block ring.

I have a softblock in my design. I want 

1) create a block ring for the block "A" and the core  ring for other modules skipping the blobk "A". I tried to do this by creating a fence, but encounter don't exclude fence, it dumps an error to chech placement status of fence :(

2) I want to create a separate stripe for block ring

3) I want the block rings to have separate follow pins . Please tell me how I can do this without CPF.

thanks

gops