# Error on "Counter" contract example

**URL:** <https://forum.fuel.network/t/error-on-counter-contract-example/2588>\
**Category:** Rust SDK\
**Created:** [May 10, 2023, 2:20pm UTC](https://forum.fuel.network/t/error-on-counter-contract-example/2588 "2023-05-10T14:20:46Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![maurice](https://avatars.discourse-cdn.com/v4/letter/m/d6d6ee/32.png) [@maurice](https://forum.fuel.network/u/maurice)\
**Post date:** [May 15, 2023, 6:42am UTC](https://forum.fuel.network/t/error-on-counter-contract-example/2588/2 "2023-05-15T06:42:06Z")

</div>

Hey Alex, looks to me like what we solved here: [Mismatched types - StorageKey\<u64\> - #14 by maurice](https://forum.fuel.network/t/mismatched-types-storagekey-u64/2498/14)

Let me know in case that doesn’t work for you 🙂

---

_[View the full topic](https://forum.fuel.network/t/error-on-counter-contract-example/2588)._