Base de connaissances du support

Error when trying to start the license manager for COMSOL 5.5 on Linux

Solution numéro: 1268 Se réfère à: COMSOL Multiphysics Versions: 5.6, 5.5

When trying to start the license manager for COMSOL Multiphysics 5.5 on my Linux computer, I receive the following error message: LMCOMSOL: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by LMCOMSOL) The ...

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Solving Complicated Models

Solution numéro: 1267 Versions: Toutes les versions

I have a large, complicated, model that is not solving, or taking a long time to solve. What should I do? There are a number of reasons why a model may not be solving, or solving very slowly. This article describes ...

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COMSOL crashes on startup after updating to Debian 10

Solution numéro: 1266 Versions: 5.4

After updating my Debian installation from Debian 9 to Debian 10, COMSOL crashes on startup. This issue has been observed by some Debian users when updating from Debian 9 to Debian 10. There are two possible solutions ...

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Running COMSOL Multiphysics in an IPv6 Environment

Solution numéro: 1265 Se réfère à: COMSOL Multiphysics, COMSOL Server Versions: 6.2

I am attempting to install or update COMSOL from an Internet Protocol version 6 (IPv6) environment. I am unable to use online documentation and/or send emails from COMSOL to a IPv6-SMTP server. ##Installation: ...

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Memory Leak in the Fortran Runtime Libraries

Solution numéro: 1264 Versions: 5.4

When running running a model that uses the MUMPS solver repeatedly on my multicore processor, I notice a small gradual increase in Memory Consumption. Please make sure that your COMSOL Multiphysics 5.4 installation is ...

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The MUMPS Solver Crashes or Hangs During Cluster Simulation

Solution numéro: 1263 Versions: 5.4

When running large models on a cluster with COMSOL Multiphysics 5.4, the MUMPS solver hangs or crashes. This issue has been fixed in Update 4 for COMSOL Multiphysics 5.4. Please update your COMSOL installation to ...

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Improving Convergence of Transient Models

Solution numéro: 1262 Versions: Toutes les versions

Transient models involve computing a solution that varies over time. To do so, the software begins with the given initial conditions and computes the evolution of the unknowns using one of several different time ...

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Performing a Mesh Refinement Study

Solution numéro: 1261 Versions: Toutes les versions

How do I gain confidence in the accuracy of the solution to my problem? How do I perform a mesh refinement study? All of the numerical methods used within COMSOL Multiphysics® discretize the modeling space via a Mesh ...

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What to do when a linear stationary model is not solving

Solution numéro: 1260 Versions: Toutes les versions

I am solving a linear stationary finite element model but the software is not solving. Why? What can I do about this? A linear finite element model is one in which all of the material properties, loads, boundary ...

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How can I see the equations COMSOL is defining? How do I implement a user-defined Multiphysics coupling?

Solution numéro: 1259 Versions: Toutes les versions

I would like to define my own customized coupling between two existing physics interfaces. How can I do this? How can I find the names of the variables that I will need to use? How can I see the names of all ...

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