Stateflow and Stateflow Coder Release Notes

Upgrading from an Earlier Release

This section describes the upgrade issues involved in moving from Stateflow 4.0.2 (Release 12.0) or earlier to Stateflow 4.1 (Release 12.1).

Transition Actions into Junctions Disallowed

Transition actions are now permitted only on transitions that terminate on states. For the following reasons, transition actions are no longer permitted on transitions that terminate on junctions; condition actions should be used instead:

• The semantics of transition actions for transitions into junctions are complex and easily misunderstood and misused.
• The complex semantics of these transition actions also result in generated code that is inefficient. Eliminating these transition actions not only simplifies Stateflow diagrams but also results in generated code that is much more efficient.

If your current model has these transition actions, they are flagged with an error. In most cases, replacing these transition actions with condition actions gives identical chart behavior.

Stateflow Coder Bug Fixes

Warning on Loading Models from Previous Stateflow Versions