Error with simout = sim (...)

I have defined three signals with timeseries, then I want to simulate a model loading this three signals I have a error with the function simout = sim ('model', 'LoadExternalInput','on', 'ExternalInput','inp', 'ExternalInput','inp1','ExternalInput','inp2'); Error using model (line 41) The number of external inputs must be equal to the number of root-level input port blocks. Root-level input port blocks include Trigger and Enable blocks. The model contains 3 root-level input port blocks, but 1 external inputs were specified in Configuration Parameters -> Data Import/Export -> Input. I don't know why doesn't recognize the signals