The Visual Composer debugger enables you to debug your model to solve problems in the runtime application that may be caused by problems in the model. You control the execution of your Visual Composer model by setting breakpoints that suspend the runtime application, and then stepping through the model to review the execution of the model step by step and examine the contents of variables.

When a debug session is started, it launches the runtime application, located on the default SAP System, in debug mode. The application is executed until it reaches a breakpoint. In addition, the Debug perspective opens and displays the information relevant for the debug session in the following views: Debug, Variables, Breakpoints, Step Details and Expressions.

During debugging, the model is not locked, and it is possible to continue changing the model. Some changes, such as changing the value of an existing element, will not cause a problem. However, we recommend not making changes to a model while it is being debugged, because such changes are not updated to the runtime, and this may cause incompatibility between the design time and the runtime. To ensure that the design time and runtime are compatible, it is necessary to deploy the model again.

The following topics are described in this section: