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When changing the license file on the license server, COMSOL Multiphysics loses contact to the license server

Solution Number: 1271 Applies to: COMSOL Multiphysics Versions: 5.5, 5.4

When the license file hosted by the license manager is changed, my running COMSOL Multiphysics session loses the connection to the license manager and does not reconnect again. This issue will be fixed in COMSOL ...


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

Solution Number: 1268 Applies to: COMSOL Multiphysics Versions: 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 ...


Solving complicated models

Solution Number: 1267 Versions: All 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 ...


COMSOL crashes on startup after updating to Debian 10

Solution Number: 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 ...


Running COMSOL Multiphysics in an IPv6 Environment

Solution Number: 1265 Applies to: COMSOL Multiphysics, COMSOL Server Versions: 5.4

When running COMSOL Multiphysics, COMSOL Server, or COMSOL Client in an Internet Protocol version 6 (IPv6) environment, some functionality may not work as expected unless you apply the software patches made available ...


Memory leak in the Fortran Runtime Libraries

Solution Number: 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 ...


The MUMPS solver crashes or hangs during Cluster Simulation

Solution Number: 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 ...


Improving convergence of transient models

Solution Number: 1262 Versions: All 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 ...


Performing a Mesh Refinement Study

Solution Number: 1261 Versions: All 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 ...


What to do when a linear stationary model is not solving

Solution Number: 1260 Versions: All 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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