I have built a model A, which has two copmonents: A1 and A2. A1's outputs is A2's inputs, and A1 has its inputs from A2's feedback. Simulating this model, I can get correct results.
Then, I output the A1's outputs bus signals to a ToWorkspace variable named bus_out with time stamp. Simulating the model again, now I can get the bus_out signal data.
Then, I delete the connection between A1 and A2. Now, I use the bus_out and define a new variable named bus_in as a Fromworkspace variable, and use bus_in as the A2's inputs. Simulating the model, now I get a quite differrent results!