Problem in simulink after using nftool for neural network

Hi, I've created a neural network with nftool (Input=one vector of 3 row and n columns, the first row is the time step. Output= one vector of 1 row and n columns) and I want to test the Simulink block generated after the training. There comes out two errors: 1)Error in port widths or dimensions. Output port 1 of 'Simulink_NFTOOL120/Neural Network/Process Input 1' is a one dimensional vector with 2 elements.

2)Error in port widths or dimensions. Input port 1 of 'Simulink_NFTOOL120/Neural Network/Layer 1' is a one dimensional vector with 3 elements.

Till now I have not changed anything, how can it be that it doesn't work?

After that I changed the automatically generated Input useing a "From File" block with inside the .mat file of the input given in the training, so I expected the same output of the nftool, but I had the same errors Please help me. Thanks in advance for Your help. Filippo