In version 6.2 and earlier versions, under the Device Model Feature node, a node called a Device Feature that created an instance of the Device Model Feature directly was available. This functionality was inconsistent with the basic framework, both how Device Model Feature nodes should be used and how Device Model features generally behave. There is a migration that converts the configuration to an equivalent configuration with a Device Model and a Device node under a Global Feature. So the migration changes the type of the Device Model Feature to a global feature, move all device-related nodes to the new Device Model node, and finally change the obsolete Device Feature node to a normal Device node. There are some complicated cases where the migration fails to do a completely valid migration. It then adds a warning giving more information about the problem.

The datasets called Parameterized Curve 2D, Parameterized Curve 3D, and Parameterized Surface in earlier versions of COMSOL Multiphysics are now called Parametric Curve 2D, Parametric Curve 3D, and Parametric Surface, respectively.

For Import, there is a new setting, Include result form virtual operations, when importing MPHBIN and MPHTXT in a work plane. In 6.2, this setting did not exist in this case, which meant that only the real part of the geometry was imported. In 6.3, the setting is on by default, which means that the whole virtual geometry is imported. This concerns the property includevirtual in the COMSOL API for use with Java.

The method geometricModel(boolean) has been replaced with geometricModel(String) to specify if a meshing sequence operates on a geometry or on a mesh.