Problem Description
You are experiencing growing memory in COMSOL Multiphysics while switching between between plots or while using plot while solving.
Solution
This issue has been observed for a few NVIDIA card and driver combinations when using OpenGL rendering.
Try the workaround to set Threaded Optimizations to off in the Nvidia Control Panel under Manage 3D Settings . This helps in most cases.
You can also try switching to software rendering if the above does not help. Open Preferences, and go to the Graphics section, and set Rendering: Software.
If you have run into this issue and need hardware rendering with OpenGL, contact COMSOL Support.
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