# ERROR: Cannot load message class for \[my\_examples\_pkg/Age\]. Are your messages built? Exercise 3.3

**URL:** <https://get-help.theconstruct.ai/t/error-cannot-load-message-class-for-my-examples-pkg-age-are-your-messages-built-exercise-3-3/5866>\
**Category:** ROS Basics In 5 Days (Python)\
**Tags:** error\
**Created:** [October 27, 2020, 5:07am UTC](https://get-help.theconstruct.ai/t/error-cannot-load-message-class-for-my-examples-pkg-age-are-your-messages-built-exercise-3-3/5866 "2020-10-27T05:07:18Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![bayodesegun](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/bayodesegun/32/10684_2.png) [@bayodesegun](https://get-help.theconstruct.ai/u/bayodesegun)\
**Post date:** [October 27, 2020, 9:30am UTC](https://get-help.theconstruct.ai/t/error-cannot-load-message-class-for-my-examples-pkg-age-are-your-messages-built-exercise-3-3/5866/2 "2020-10-27T09:30:17Z")

</div>

Hi @akshay.ulavan,

Welcome to the Community!

For solving this problem, please have a look at this post:

> **[ERROR: Cannot load message class for \[package/Message\]. Are your messages built?](https://get-help.theconstruct.ai/t/error-cannot-load-message-class-for-package-message-are-your-messages-built/55)**
>
> This error usually happens when you create a custom ROS message. SOLUTION: Please check the following in order. Painfully 🙂, #3 is a common and repeated cause, and it tends to happen even if you already know about it! Have you made the...

---

_[View the full topic](https://get-help.theconstruct.ai/t/error-cannot-load-message-class-for-my-examples-pkg-age-are-your-messages-built-exercise-3-3/5866)._