Support Knowledge Base

COMSOL Multiphysics crashes silently when modeling. When you try to restart COMSOL it may crash immediately. The cause of this behavior can be a hardware error on some part of your memory cards. It is recommended that...
Version: All versions - Platform: All Platforms

I get the warning MUMPS allocation factor increased to 1.44 If you get a solution, this warning is nothing to worry about. You can get rid of the warning and possibly get a little shorter solution time by setting the...
Version: All versions - Platform: All Platforms

When I look at the Solver Log of a time dependent model, I see that the NLFail column has non-zero entries: Step TimeStepsize Res JacSolOrderTfailNLfailLinErrLinRes 0 0-out 23208e-14 3.5e-15 ...
Version: All versions - Platform: All Platforms

When updating the COMSOL model library, I get the following message: Error contacting the update server Please check your internet connection. If you think your internet connection is fine, you are maybe connected...
Version: All versions - Platform: All Platforms

When I synchronize the geometry between AutoCAD LT and COMSOL Multiphysics I get the error message: Failed to connect to AutoCAD. Please make sure AutoCAD is running. AutoCAD LT does not support third party add-ins....
Version: All versions - Platform: Windows

When I try to synchronize the geometry between COMSOL and SOLIDWORKS, the error message Failed to connect to SOLIDWORKS. Please make sure SOLIDWORKS is running. is displayed, and the COMSOL Multiphysics tab in...
Version: All versions - Platform: Windows

I am solving a time-dependent wave-type problem, what mesh and solver settings should I adjust for better accuracy and runtimes? The accuracy of a time-dependent model solving for electromagnetic, acoustic,...
Version: All versions - Platform: All Platforms

This knowledge base outlines some hardware recommendations if you plan to set up your own compute cluster for running distributed COMSOL jobs. Depending upon the type of problems that you want to solve you will want to...
Version: All versions - Platform: Windows, Linux

I have installed a new MATLAB version, but running COMSOL with MATLAB keeps opening the older version of MATLAB. You need to manually update the MATLAB root directory path. In the COMSOL Desktop, go to the Options...
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This knowledgebase describes how to benefit from the recovery feature in COMSOL. This is particularly useful if you have a long computation that for some reason was interrupted at some point, maybe due to system...
Version: All versions - Platform: All Platforms