Trying to work with TMap emit an error on compile

Hello there, i am trying to make a procedural mesh to create a planet in blueprint by translating this tutorial : https://medium.com/@peter_winslow/cr…1-df83ecb12e91

And I’m confronted to a problem I don’t understand :

On compile, console return this errors :
Blueprint Internal Compiler Error: Could not connect default value to input pin Mid Points Cache
Default value ‘’ for Mid Points Cache is invalid: 'Map inputs (like ‘Mid Points Cache’) must have an input wired into them (try connecting a MakeMap node).

Could someone help me to understand this problem ?

What i’m surprised of is when this message occured for the first time, i’ve seen that i didn’t use MakeMap in “subdivide()” and i kept some BP component on the construction script without defining the Map. So now, i’ve fixed these pbs, but i still have these errors.

Thank you by advance :smiley: