# Ros Service-Part2 Example 3.8 Problem

**URL:** <https://get-help.theconstruct.ai/t/ros-service-part2-example-3-8-problem/80>\
**Category:** ROS Basics In 5 Days (Python)\
**Created:** [July 19, 2019, 1:19pm UTC](https://get-help.theconstruct.ai/t/ros-service-part2-example-3-8-problem/80 "2019-07-19T13:19:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**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:** [July 19, 2019, 2:35pm UTC](https://get-help.theconstruct.ai/t/ros-service-part2-example-3-8-problem/80/2 "2019-07-19T14:35:37Z")

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@bulutenesemre, It seems your custom message is not ready yet. Please have a look at post below and let me know if it solves your problem.

> **[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...

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