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Postprocessing (15)
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When you are working with the Moving Mesh (ALE) and Parameterized Geometry application modes to move things around, the computational mesh gets deformed. If the deformations become too large, some of the mesh elements...
Version: 3.5 - Platform: All Platforms

I am getting an error message and when I click "Details>>" I can read the following log: Exception: com.femlab.jni.FlNativeException: License errorMessages: License errorStack...
Version: 3.3,3.4,3.5 - Platform: Windows

Where can I find documentation on the theoretical background of the algorithms and techniques used by COMSOL Multiphysics for Finite Element Analysis? The COMSOL Multiphysics manuals provide a good deal of theoretical...
Version: 3.4,3.5,3.5a,4.0 - Platform: All Platforms

3D beams that are modeled on edges of a 3D structure need a local coordinate system for a number of reasons. Indata: You need a coordinate system to specify indata such as area moment of inertia. Postprocessing: If...
Version: 3.3 - Platform: All Platforms

I get this message: Failed to find a solution:No convergence, even when using the minimum damping factor.Returned solution has not converged. This message is returned for nonlinear problems that fail to converge. More...
Version: 3.4,3.5,4.0 - Platform: All Platforms

In COMSOL 4.0, I get this error message: Could not obtain license for COMSOL GUI License error -15 In COMSOL 3.5a, I get this error message: License error -15 Cannot connect to license server system and the text in...
Version: 3.3,3.4,3.5,3.5a,4.0 - Platform: All Platforms

Can I do optimization in a COMSOL Multiphysics model? Optmization Lab If you run COMSOL Multiphysics in combination with the Optimization Lab, it is possible to do different optimization tasks. See the Optimization Lab...
Version: 3.5a - Platform: All Platforms

What does the error message "Singular Matrix" mean? The problem is that the stiffness matrix of the linear system is singular and the linear solver cannot invert it. Examples of practical modeling situations where this...
Version: 3.4,3.5 - Platform: All Platforms

Why do I get negative values of the concentration in my diffusion/convection model? It is clearly unphysical. There are several possible reasons for negative concentrations: Numerical errors The most common reason for...
Version: 3.4,3.5,3.5a - Platform: All Platforms

I have set up a model of a number of conductors. How can I compute all the entries of the multiconductor capacitance matrix? The COMSOL Multiphysics AC/DC Module features a dedicated port boundary condition for...
Version: 3.4,3.5 - Platform: All Platforms

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