All Solutions
Communication error with remote service when using COMSOL Chatbot with GPT-5
Solution Number: 1336 Versions: All versionsWhen using the COMSOL Chatbot with the OpenAI or Azure OpenAI providers and a reasoning model such as GPT-5 a “Communication error with remote service” occurs This issue can occur when the Chatbot does not begin ...
COMSOL 6.4 macOS Apple Silicon Native Support
Solution Number: 1335 Versions: 6.4Please note This entry concerns COMSOL 6.4. For COMSOL 6.3, COMSOL 6.2 and 6.1, please see Knowledge Base 1321, Knowledge Base 1307 and Knowledge Base 1300 respectively. System Requirements COMSOL 6.4 for macOS ...
COMSOL Uses Increasing Amount of GPU Memory (VRAM)
Solution Number: 1332 Versions: All versionsYou are experiencing growing GPU memory (VRAM) usage in COMSOL Multiphysics while switching between between plots, while using plot while solving, while using probe plots while solving, or while having convergence ...
Licensing error -39,147 on a Linux machine with an NSL license
Solution Number: 1331 Versions: All versionsWhen trying to launch the software on a Linux Machine with an NSL license installed, I receive the following or a similar error message: License error: -39. User/host not on INCLUDE list for product. User/host not on ...
Deprecation of SNOPT
Solution Number: 1330 Applies to: Optimization Module Versions: 6.4What is the recommended alternative to SNOPT, post deprecation? Support for the SNOPT optimization solver will be deprecated from the Optimization Module at COMSOL Multiphysics 6.4. If you have used SNOPT in the ...
Avoiding Power Throttling on Windows
Solution Number: 1329 Versions: 6.3, 6.2, 6.1, 6.0When COMSOL Desktop runs in the background or behind the screen lock on Windows 10 or 11 you might notice a slowdown due to power throttling. Test solving a large model while working on something else in another ...
New Free Space workflow for some AC/DC interfaces
Solution Number: 1326 Applies to: AC/DC Module Versions: 6.3, 6.2When creating a new Magnetic Fields model in COMSOL Multiphysics 6.2 or newer and following a modeling workflow I got used to in COMSOL Multiphysics 6.1 or earlier, I get different results. It seems the material ...
New default solver settings for stationary simulations with fluid flow interfaces in version 6.3 update 1
Solution Number: 1325 Versions: 6.3In a majority of cases, the new solver settings substantially reduce the solution time. If you prefer to use the old solver settings, you can reset the solver configurations by following a few simple steps presented ...
Tuning Computer Performance
Solution Number: 1324 Versions: All versionsAre there any settings related to the Operating System that can improve COMSOL Multiphysics® performance? The following settings can affect performance. They may already be at their optimal settings on your computer. ...
Log4j warning after installing COMSOL 6.3
Solution Number: 1323 Versions: 6.3After installing COMSOL 6.3 my security scan gives a log4j warning pointing to C:\Program Files\COMSOL\COMSOL63\Multiphysics\license\win64\lmadmin\examples\alerter\lib\log4j-core-2.17.0.jar COMSOL Version 6.3 is not ...
