Order of static reactions - Statechart Module

[jfazekas]

After studying the article describing the code generation for Statechart Module logic, it appears to me that static reactions within a given state will execute in the order they are created -- which is the order in which they are listed 'Reactions' list pane.

If I have several static reactions in a given state, can anyone verify my suspicion or educate me as to how to know the order data flow within a state?

[aggieNick02]

You are correct. The static reactions will execute in the order they are listed in the configuration dialog, which is precisely the order in which they were created.

[jfazekas]

Thanks very much.

This prompts a needed feature in the Labview State configurator: the ability to change the order of static reactions.  I understand that Entry and Exit actions must be at the top of the list, but there is no way I see to change the order of static reactions you create without deleting them and re-creating them in the order you need.

[aggieNick02]

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Jonathan Fazekas wrote:

Thanks very much.

This prompts a needed feature in the Labview State configurator: the ability to change the order of static reactions.  I understand that Entry and Exit actions must be at the top of the list, but there is no way I see to change the order of static reactions you create without deleting them and re-creating them in the order you need.

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I agree this would be very nice to have. There is a viable workaround (deleting and recreating in the order you need), but that is kindof painful, so hopefully this functionality will be added in some future release.

[jfazekas]

To test this behavior I made a static reaction just now with six static reactions in which the order of execution is logged to disk.  I noticed that when I compiled the statechart (whatever happened to compile as you program?) and re-opened the Configure State panel, the reactions are slightly reorganized such that the reaction I desired to run sixth is now running third in the list!! 

I think there may be other factors influencing the order in the reaction list pane other than time of creation.

[aggieNick02]

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Jonathan Fazekas wrote:

To test this behavior I made a static reaction just now with six static reactions in which the order of execution is logged to disk.  I noticed that when I compiled the statechart (whatever happened to compile as you program?) and re-opened the Configure State panel, the reactions are slightly reorganized such that the reaction I desired to run sixth is now running third in the list!! 

I think there may be other factors influencing the order in the reaction list pane other than time of creation.

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Ouch. That's definitely not supposed to happen. Which version of LV are you using? I will try to reproduce it and create a CAR for this bug. Thanks for the info/help.

[jfazekas]

If you want to email me or create an SR I'd be happy to respond with some screenshots demonstrating this observation.

I'm using 8.6.

[aggieNick02]

If you can give me the exact steps you did that gave the wrong behavior that would be great. I tried a little creating reactions and they seemed to stay in the order I created.

You could either respond here, or if you would prefer to email or create an SR, let me know and we can do that. Thanks.

[jfazekas]

Here is how to recreate:

1. create five reactions named 1,2,3,4,5
2. compile statechart
3. delete reaction 3
4. delete reaction 2
5. click on reaction 4
6. create a reaction named '2'
7. create a reaction named '3'
8. compile the statechart

I would expect the  reaction list to show in this order, 1,4,5,2,3 but it really shows 1,2,3,4,5.

Looks like using the same name as a previously deleted reaction may be a part of the issue.

[aggieNick02]

Ok, thanks. I will dig a bit and then have a CAR number for you and more details, hopefully this afternoon.