Simulink problem related with data dimension

Hello comunity,

I'm trying to run a simulink but i have a problem with a variable dimension.

In my code I work with 3 rows vectors named z and barz. But in a certain point of the compilation simulinks prompt me an error related with the dimensions of this vector.

How it can be seen the output of multiplexors is a vector but passing through the output sink it seems to take a unidimensional signal...

Do you have any idea about what is happening?

Thank you all in advance.

[Kaustubha Govind]

Is this screenshot from a subsystem? What is connected at the output 'barz'? It appears that Simulink is back-propagating and thinks that the block connected to 'barz' wants a scalar signal.