Release Notes > COMSOL Multiphysics > Backward Compatibility with Version 5.0

Backward Compatibility with Version 5.0
Mesh Import
The method used to automatically partition the boundary of imported meshes in 3D has been improved. If you have an existing model, you can work with it without being affected. However, if you click the Import button of the Import feature in the meshing sequence, the file is read again and the new partitioning method is used. The exception is if the Import feature had Boundary partitioning set to Manual. In this case, the modified parameter values are preserved under the Feature detection setting, which uses the same algorithm as in version 5.0.
COMSOL tries to map the old selection on boundaries to the new boundaries, but it is not always possible to do accurately when new faces have appeared or old faces have disappeared. You may have to manually review and update boundary, edge, and point selections after reimporting the mesh.
If you have a Java® or MATLAB® program that imports meshes, the number of geometric entities may have changed compared to older versions.
Security Settings
In version 5.2a, the Allow external process and libraries check box on the Security page in the Preferences dialog box is cleared by default to not allow applications to start external processes on the computer. The default setting in 5.0 is set to allow such external processes.
Display of Max/Min Markers in Plots
The display of max/min markers in plots is now off by default to make plots fit better when using a small graphics canvas. In previous versions, the display of max/min markers in plots was on by default.
Merged MPH-File Format
The MPHAPP-file and MPH-file formats have been merged since version 5.1, and all application files use the .mph file suffix. You can still open MPHAPP-files created in version 5.0.