I am a starter in TI processes and I am now stuck

The goal is to copy data in two unique cubes that differ in two dimensions.
Aftern running the process, the message that occurs is: 'Wrong Number of Dimension Elements'.
What I think might be the problem is this difference in dimensionality, however after researching, I do not have the solution yet.
Is there anything which allows to skip the read of certain dimensions in the data source? Or in general what is the logic to follow in this cases?
However the problem can be something else! I'd be glad to get in touch with more experienced people
