# Client received an error 800180: Command received no ack

**URL:** <https://community.sendbird.com/t/client-received-an-error-800180-command-received-no-ack/3592>\
**Category:** Android\
**Created:** [December 16, 2021, 11:28am UTC](https://community.sendbird.com/t/client-received-an-error-800180-command-received-no-ack/3592 "2021-12-16T11:28:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Viki](https://avatars.discourse-cdn.com/v4/letter/v/8baadc/32.png) [@Viki](https://community.sendbird.com/u/Viki)\
**Post date:** [December 16, 2021, 11:28am UTC](https://community.sendbird.com/t/client-received-an-error-800180-command-received-no-ack/3592/1 "2021-12-16T11:28:09Z")

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Hello,  
We are using Sendbird for Chat in our Android application. One of our clients complained that he received an error on while trying to send a message. Error that he received was this:

Send failed with error 800180: Command received no ack.

I just wanted to check, was this just some temporary error or maybe something connected with user’s account? I have tested, and sending messages works fine.

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**Author:** ![walter.rodriguez](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/walter.rodriguez/32/546_2.png) [@walter.rodriguez](https://community.sendbird.com/u/walter.rodriguez)\
**Post date:** [December 16, 2021, 11:35am UTC](https://community.sendbird.com/t/client-received-an-error-800180-command-received-no-ack/3592/2 "2021-12-16T11:35:54Z")

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Hello, @Viki and welcome to the community!

This is a minor error and it happens when the connection is poor or intermittent.  
The socket is waiting for the server to acknowledge the last command sent.

To provide a good experience in relation to connections, remember to implement a connection handler:

> **[Event handler | Chat Android SDK | Sendbird Docs](https://sendbird.com/docs/chat/v3/android/guides/event-handler#2-add-and-remove-a-connection-event-handler)**
>
> Learn about the functionalities of the event handler.

In case of disconnection, Sendbird SDK will trigger these functions so you can inform you customers. As well when the connection is restored.

Walter.

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<div class="post-metadata">

**Author:** ![Viki](https://avatars.discourse-cdn.com/v4/letter/v/8baadc/32.png) [@Viki](https://community.sendbird.com/u/Viki)\
**Post date:** [December 16, 2021, 11:38am UTC](https://community.sendbird.com/t/client-received-an-error-800180-command-received-no-ack/3592/3 "2021-12-16T11:38:00Z")

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Thanks a lot for the answer!