Simulating the Rigid Fourbar
You’ll now try to simulate the fourbar that you imported into your modeling database. You will not, however, be able to simulate it. Instead, you’ll receive an error in the message window.
To simulate the rigid fourbar:
1. Click the Simulation tab on the Adams View ribbon.
2. From the Simulate container, click the Simulate tool 
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. 3. From the Simulations Control dialog box, select the Simulation Start tool 
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. The simulation fails and the following error message appears:
ERROR: No convergence was achieved after 25 iterations while solving for the kinematic displacements.ERROR: Simulation failure detected
4. Closely examine the model to see that the joints are misaligned making the mechanism locked and, therefore, unable to simulate. We’ve intentionally added this misalignment to highlight the impact flexibility can have on your model.