# Need Help- Circular Dependency Error

**URL:** <https://forum.xod.io/t/need-help-circular-dependency-error/6922>\
**Category:** Uncategorized\
**Created:** [July 22, 2024, 10:41am UTC](https://forum.xod.io/t/need-help-circular-dependency-error/6922 "2024-07-22T10:41:39Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![marlowepierce](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/marlowepierce/32/3936_2.png) [@marlowepierce](https://forum.xod.io/u/marlowepierce)\
**Post date:** [July 22, 2024, 10:41am UTC](https://forum.xod.io/t/need-help-circular-dependency-error/6922/1 "2024-07-22T10:41:39Z")

</div>

Hey everyone,

I’m relatively new to using XOD and I’m running into an issue that I can’t seem to figure out. I’m getting a “Circular Dependency Error” in my project, and it’s driving me nuts! 😫

I’m trying to create a project where a sensor reads data, processes it, and then sends a signal to another node to perform an action. But for some reason, XOD keeps throwing this circular dependency error at me. I’ve double-checked my connections and logic, but I’m still stuck.

Here’s a bit more detail on what I’m trying to do:

- Sensor node reads data (e.g., temperature sensor)
- The data is processed by a node to determine if an action is needed
- If the action is needed, it sends a signal to another node (e.g., a motor controller)

When I was searching about this I came across to these resources/articles [Error While downloading Dependencies](https://forum.xod.io/t/error-while-downloading-dependencies/3122) [Salesforce admin tutorial](https://www.igmguru.com/blog/salesforce-admin-tutorial/) [Errors — XOD](https://xod.io/docs/guide/errors/) and based on them I tried the following.

I’ve checked my connections multiple times and can’t see any obvious loops.

What exactly does this error mean, and how can I resolve it? Has anyone else encountered this and found a solution?

Any advice or suggestions would be greatly appreciated! Thanks in advance!

Cheers,

---

<div class="post-metadata">

**Author:** ![gweimer](https://avatars.discourse-cdn.com/v4/letter/g/a9adbd/32.png) [@gweimer](https://forum.xod.io/u/gweimer)\
**Post date:** [July 22, 2024, 1:01pm UTC](https://forum.xod.io/t/need-help-circular-dependency-error/6922/2 "2024-07-22T13:01:29Z")

</div>

We would need to see your code to offer specific help. Since it mentions “circular dependency”, I’m assuming you are looping back up in your code, creating a loop. XOD requires a ‘defer’ node in the wire whenever you do this. For example, if there is a pulse when you are done processing the temperature, and you want to run this back up the code to initiate another temperature reading, you need to run the pulse to a ‘defer’ node, then to the temperature-read node.

---

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex027/uploads/xod/original/1X/eb7348baa04192c2ef932d1db54d44f09f8a7888.png) [@system](https://forum.xod.io/u/system)\
**Post date:** [August 21, 2024, 1:01pm UTC](https://forum.xod.io/t/need-help-circular-dependency-error/6922/3 "2024-08-21T13:01:38Z")

</div>

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.