# What is Exclusive checkbox in Flowable Modeler used for and how to design a nested inclusive gateway?

**URL:** <https://forum.flowable.org/t/what-is-exclusive-checkbox-in-flowable-modeler-used-for-and-how-to-design-a-nested-inclusive-gateway/7339>\
**Category:** Modeler remodeled\
**Created:** [January 16, 2021, 4:58am UTC](https://forum.flowable.org/t/what-is-exclusive-checkbox-in-flowable-modeler-used-for-and-how-to-design-a-nested-inclusive-gateway/7339 "2021-01-16T04:58:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Esther](https://avatars.discourse-cdn.com/v4/letter/e/8c91f0/32.png) [@Esther](https://forum.flowable.org/u/Esther)\
**Post date:** [January 16, 2021, 4:58am UTC](https://forum.flowable.org/t/what-is-exclusive-checkbox-in-flowable-modeler-used-for-and-how-to-design-a-nested-inclusive-gateway/7339/1 "2021-01-16T04:58:18Z")

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Hi ,

Can someone explains the use of Exclusive checkbox in Flowable modeler. sometimes turning it on/off halts the exclusive gateway at some point.

And how to design a nested inclusive gateway. Because I noticed that sometimes the L2 inclusive gateway start - halts for the task in L1 to be completed. Could you please explain.

L1 - Inclusive gateway with multiple tasks starts

L2 - Inclusive gateway with multiple tasks starts

L2- Inclusive gateway with multiple tasks ends

L1- Inclusive gateway with multiple tasks ends

Thanks,  
Esther.

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**Author:** ![joram](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/joram/32/26_2.png) [@joram](https://forum.flowable.org/u/joram)\
**Post date:** [January 19, 2021, 9:45am UTC](https://forum.flowable.org/t/what-is-exclusive-checkbox-in-flowable-modeler-used-for-and-how-to-design-a-nested-inclusive-gateway/7339/2 "2021-01-19T09:45:22Z")

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See [BPMN 2.0 Constructs · Flowable Open Source Documentation](https://flowable.com/open-source/docs/bpmn/ch07b-BPMN-Constructs/#exclusive-jobs) for what the exclusive does.

> [@Esther](#):
>
> And how to design a nested inclusive gateway. Because I noticed that sometimes the L2 inclusive gateway start - halts for the task in L1 to be completed.

Note that inclusive gateway joins work in a very specific way - nesting them is not easy. See [BPMN 2.0 Constructs · Flowable Open Source Documentation](https://flowable.com/open-source/docs/bpmn/ch07b-BPMN-Constructs/#inclusive-gateway), esp. the join part there.