MATLAB DATABASE TOOLBOX RELEASE NOTES Guide de l'utilisateur télécharger pdf (Page 104)

4 Stateflow 4.1 Release Notes

4-6

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 that refers you to Appendix D of the online Stateflow User’s Guide,

“Obsolete Features,” for a workaround. In most cases, replacing these

transition actions with condition actions gives identical chart behavior.

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MATLAB DATABASE TOOLBOX RELEASE NOTES Guide de l'utilisateur Page 104