Your tip was very helpful but i found another problem with setting a variable of child actor component, which was the fact that it cant inherit the index. I guess i did something wrong but i found another solution for the problem. I simply needed to int->string and then string->name and now i can set tag of a component as the index of creation so it absolutely solved the problem.
I also tried to do it other way but i faced problems with casting i dont understand well yet and i could not find any function that would allow me to connect the reurn value to set(index) of childactor(component). Once I managed to plug sth to the target node but i got an information that cast would always fail beacause the box(actor that is in my board BP) cannot inherit from the board so i guess i will keep going with the solution i found but i hope you can give me some tip how to do the casting properly.
PS Thank you very much for helping me to find a solution.
