Diagnostics

View diagnostics for models, configure and customize diagnostic checks, understand diagnostic viewer layout

Simulink^® provides diagnostic messages when certain conditions are detected during a Simulink operation on a model. The diagnostic messages are captured under error, information, or warning categories.

The diagnostic messages you encounter in programmatic operations are displayed in the MATLAB^® Command Window, while those you encounter during a Simulink user interface operation are displayed in the Diagnostic Viewer. For example, if you simulate a model from the MATLAB command prompt using the sim function, the diagnostics messages are displayed in the Command Window. However, if you run a simulation from the Simulink Toolstrip, the diagnostic messages are displayed in the Diagnostic Viewer.

You can customize the diagnostic messages, and also customize the conditions the software checks to either produce errors or warnings.

The diagnostics for model are displayed in the Diagnostic Viewer user interface. To know more about the diagnostic viewer, see the topic View Diagnostics.

You can also add Model Verification blocks to your model, to check the condition of specific signals. For more information about Model Verification, see topics listed under Run Model Advisor Checks.

Functions

`sldiagnostics`	Display diagnostic information about Simulink system
`Simulink.restoreDiagnostic`	Restore diagnostic warnings to a specific block, subsystem, or model
`Simulink.suppressDiagnostic`	Suppress a diagnostic from a specific block
`Simulink.getSuppressedDiagnostics`	Return `Simulink.SuppressedDiagnostic` objects associated with a block, subsystem, or model
`Simulink.BlockDiagram.getChecksum`	Return model checksum
`Simulink.SubSystem.getChecksum`	Return checksum of nonvirtual subsystem
`modeladvisor`	Open Model Advisor
`sldebug`	Start simulation debugging session for Simulink model
`addterms`	Add terminators to unconnected ports in model
`sldiagviewer.createStage`	Create a stage to display diagnostic messages
`sldiagviewer.reportError`	Report error messages in Diagnostic Viewer
`sldiagviewer.reportInfo`	Report information messages in Diagnostic Viewer
`sldiagviewer.reportWarning`	Report warning messages in Diagnostic Viewer
`sldiagviewer.diary`	Log simulation warnings and errors and build information to file
`sldiagviewer.reportSimulationMetadataDiagnostics`	Display errors and warnings in `Simulink.SimulationOutput` object using Diagnostic Viewer

Classes

`Simulink.SuppressedDiagnostic`	Suppress diagnostic messages from a specified block
`sldiagviewer`	Generate, display, and log diagnostic messages in the Diagnostic Viewer

Model Settings

Model Configuration Parameters: Diagnostics

Model Configuration Parameters: Sample Time Diagnostics

Model Configuration Parameters: Data Validity Diagnostics

Model Configuration Parameters: Type Conversion Diagnostics

Model Configuration Parameters: Connectivity Diagnostics

Model Configuration Parameters: Compatibility Diagnostics

Model Configuration Parameters: Model Referencing Diagnostics

Model Configuration Parameters: Stateflow Diagnostics

Checks

Runtime diagnostics for S-functions

Check if read/write diagnostics are enabled for data store blocks

Check for non-continuous signals driving derivative ports

Check for Discrete-Time Integrator blocks with initial condition uncertainty

Check for potentially delayed function-call subsystem return values

Topics

Diagnostic Viewer

View Diagnostics
View and diagnose errors and warnings with the Diagnostic Viewer.
Systematic Diagnosis of Errors and Warnings
Identify and locate errors and warnings systematically.
Report Diagnostic Messages Programmatically
Use sldiagviewer functions to generate, display, and log diagnostic messages.
Suppress Diagnostic Messages Programmatically
Suppress and restore diagnostic messages programmatically.
Customize Diagnostic Messages
Customize error messages to display text and hyperlink.
Error Handling in Simulink Using MSLException
Simulink allows you to report an error by throwing an exception using the MSLException object, which is a subclass of the MATLAB MException class.

Related Information

Run Model Advisor Checks