How to define blocks in blockmesh
 

Hello,
I am trying to make a big block out of nine smaller blocks to be able to refine them separately afterwards.
I defined the vertices and the blocks, as you can see below. I tried to define it in a few ways, but none of them worked. Every time when I run the blockMesh command, there are some mistakes.

Could someone please help me find out what's wrong?
The blockMeshDict file and a picture which shows the mistake is included.
Thanks in advance:)

Does this https://github.com/damogranlabs/classy_blocks help?

Hi dlahaye, thanks for your response. I don't have any experience with python therefor unfortunately it's not helpful. Is there maybe a simpler tool or way to do that?