# How to use to nodes at the same time

**URL:** <https://forum.hello-robot.com/t/how-to-use-to-nodes-at-the-same-time/781>\
**Category:** Ask\
**Created:** [August 3, 2023, 11:54am UTC](https://forum.hello-robot.com/t/how-to-use-to-nodes-at-the-same-time/781 "2023-08-03T11:54:09Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![Mohamed\_Fazil](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.hello-robot.com/mohamed_fazil/32/261_2.png) [@Mohamed\_Fazil](https://forum.hello-robot.com/u/Mohamed_Fazil)\
**Post date:** [August 3, 2023, 3:51pm UTC](https://forum.hello-robot.com/t/how-to-use-to-nodes-at-the-same-time/781/2 "2023-08-03T15:51:54Z")

</div>

Hi @Humberto_Andres_Hida,  
I am guessing the issue is that both the launch you have described will launch the stretch\_drive node simultaneously, which would make either one of them fail because only one stretch\_driver node could run at an instance. I would recommend you comment out the stretch\_driver node inclusion [code block](https://github.com/hello-robot/stretch_ros/blob/noetic/stretch_deep_perception/launch/stretch_detect_objects.launch#L13:L17) in the [navigation.launch](https://github.com/hello-robot/stretch_ros/blob/noetic/stretch_navigation/launch/navigation.launch) or the [stretch\_detect\_objects.launch](https://github.com/hello-robot/stretch_ros/blob/noetic/stretch_deep_perception/launch/stretch_detect_objects.launch) file so that the stretch driver node is only launched once.

---

_[View the full topic](https://forum.hello-robot.com/t/how-to-use-to-nodes-at-the-same-time/781)._