The Events (ev) interface (), found under the Mathematics>ODE and DAE Interfaces branch () when adding a physics interface, is used to create solver events. An event can be explicit or implicit, and the difference is that for explicit events you must specify the exact time when the event occurs. When an event occurs, the solver stops and provides a possibility to reinitialize the values of states and dependent variables.

The Label is the default physics interface name.

The Name is used primarily as a scope prefix for variables defined by the physics interface. Refer to such physics interface variables in expressions using the pattern <name>.<variable_name>. In order to distinguish between variables belonging to different physics interfaces, the name string must be unique. Only letters, numbers, and underscores (_) are permitted in the Name field. The first character must be a letter.

The default Name (for the first Events interface in the model) is ev.

The following nodes are available from the Events ribbon toolbar (Windows users), Events context menu (macOS or Linux users), or by right-clicking to access the context menu (all users).