Support Knowledge Base

Error Messages

1056: Warning: New constraint force nodes detected

I get this error message: Warning: New constraint force nodes detected. What does it mean? As is indicated in the message, this is a warning message and not an error message, meaning that your model may be just fine....
Version: All versions - Platform: All Platforms

1030: Error: "Out of memory"

I get an error message, that contains the words Out of memory, for example: Out of memory during LU factorization. or Out of memory during assembly Background Before resolving this issue, you should go through...
Version: All versions - Platform: All Platforms

1022: Updating the COMSOL License Manager

When starting COMSOL Multiphysics, I receive this error message: Could not obtain license for COMSOL Multiphysics GUI. License error: -25 License server system does not support this version of this...
Version: All versions - Platform: All Platforms

983: Error: Internal Error in Geometry Decomposition

Why do I get the error message “Internal error in geometry decomposition”? This error means that COMSOL Multiphysics failed to resolve the geometry relations. If your geometry consists of several objects, the...
Version: All versions - Platform: All Platforms

964: Error: Failed to find a solution. Returned solution is not converged

I get this message: Failed to find a solution. The relative residual (0.28) is greater than the relative tolerance. Returned solution is not converged. Messages similar to this are returned for nonlinear problems...
Version: All versions - Platform: All Platforms

953: Error: Singular Matrix

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...
Version: All versions - Platform: All Platforms

933: Troubleshooting graphics issues

Chances are that there is a graphics rendering problem if any of these symptoms show up: The graphics window is black It is not possible to mouse-select objects in the graphics window The COMSOL application crashes...
Version: All versions - Platform: All Platforms

830: Handling large models

Models with many domains, boundaries, and physics features are slow to work with. Large models can contain hundreds or even thousands of domains, boundaries, and physics features. Such a large number of features...
Version: All versions - Platform: All Platforms

103: Improving Convergence of Nonlinear Stationary Models

Stationary (time-invariant) models with nonlinearities may converge very slowly. A nonlinearity can be introduced into the model either in the governing equation, or by making any of the material properties, loads, or...
Version: All versions - Platform: All Platforms

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