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User Guide
Learn about the features and functionality available in Twin Activate.
Simulation
Learn how to set up, run, and troubleshoot simulations.
Debugger
The Twin Activate debugger is an interface that lets you control the advancement of a simulation so that, at every pause, you can inspect and modify block objects, which includes model signals.
Start Simulation in Debug Mode
Run a simulation in debug mode using the user interface.

Welcome
What's New
Discover new features and enhancements.
Get Started
New to Twin Activate? Learn the basics here.
Tutorials
Start using Twin Activate with our interactive tutorials.
User Guide
Learn about the features and functionality available in Twin Activate.
- Model Components
  Learn about the components in Twin Activate models.
- Physical Component Modeling
  Learn about modeling physical components.
- Hydraulic System Modeling
  Learn about modeling hydraulic systems with the Hydraulics library (HydraulicsByFluidon).
- Electrical System Modeling
  Learn about modeling electrical and electronic systems with Modelica and Spice.
- Multibody Mechanical System Modeling
  Learn about modeling multibody dynamic systems.
- Electromagnetic System Modeling
  Learn about modeling electromagnetic systems.
- Simulation
  Learn how to set up, run, and troubleshoot simulations.
  - Set Simulation Parameters
    Before executing a simulation, you can define parameters for simulation time, zero-crossing and solvers.
  - Create a Results File
    Capture and review simulation results including the signals of all blocks in a model.
  - Run a Simulation
    Execute a simulation with the Run tool on the ribbon.
  - View Results
    Discover options to review, display, and export results.
  - Troubleshoot
    Learn troubleshooting techniques for common simulation issues.
  - Debugger
    The Twin Activate debugger is an interface that lets you control the advancement of a simulation so that, at every pause, you can inspect and modify block objects, which includes model signals.
    - Start Simulation in Debug Mode
      Run a simulation in debug mode using the user interface.
    - Pause Conditions
      The Twin Activate debugger interface lets you define conditions under which the debugger pauses so you can inspect and modify blocks.
    - Debugger Actions
      In debug mode, you can take actions to progress the simulation and modify blocks during pauses.
  - Functional Mock-Up Interface Support
    The Functional Mock-Up Interface (FMI) is an emerging standard for creating interfaces between different tools.
  - Simulation Phases
    The process of simulating a model occurs in three phases: Evaluation, Compilation and Simulation. The Evaluation and Compilation phases occur first and generate a structure that is processed during the Simulation phase.
  - Optimization and Linearization
    Learn about the methods to optimize and linearize models.
  - OML Editor
    The OML editor is used to create, edit, and execute OML scripts.
  - Spice Netlist
    Spice Netlist lets you create a spice netlist of all spice components of the current model.
- Libraries and Extension Manager
  Learn about block libraries and managing them through the Extension Manager.
- Code Generation
  Learn about generating C code from a Super Block.
- Graphical User Interfaces
  Learn about the methods for creating a GUI in Twin Activate.
- Import Tools
  Import Embed diagram models into Twin Activate with the Embed Import tool.
- Export Tools
- Block Builder
  Use the Block Builder tool to easily construct and customize basic blocks and programmable super blocks.
- MAT Explorer
  Use the MAT Explorer interface to explore and load variables from one or more .MAT files, providing a visual way to see the contents of selected .MAT files and to import variables into an OML session.
- Keyboard Shortcuts
  Define shortcuts to common operations.
Reference Guides
Explore the Extended Definitions, OML Guides, Block Library, API Guide and Glossary.
Frequently Asked Questions
You've got questions? We've got answers!

Start Simulation in Debug Mode

Run a simulation in debug mode using the user interface.

Open a model you want to simulate.
To start debug mode, open the Simulation ribbon, and then select Debug.

The model's simulation is started and paused before calling the first block simulation function. The interactive Twin Activate debugger dialog box opens.

At this point, you can determine conditions under which the simulation is paused. You can also decide what actions to take when the simulation is paused. There are many options for conditions and actions. For more detailed information on conditions, see Pause Conditions. For more information on actions, see Debugger Actions.
Note: You can also open debug mode using the OML command DebugRun.