# Slack Import Shows Messages Transferred, But Channels Are Empty

**URL:** <https://forums.rocket.chat/t/slack-import-shows-messages-transferred-but-channels-are-empty/22358>\
**Category:** Community Support\
**Tags:** rocketchat-apps\
**Created:** [July 21, 2025, 10:30pm UTC](https://forums.rocket.chat/t/slack-import-shows-messages-transferred-but-channels-are-empty/22358 "2025-07-21T22:30:01Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![joel1231](https://avatars.discourse-cdn.com/v4/letter/j/a587f6/32.png) [@joel1231](https://forums.rocket.chat/u/joel1231)\
**Post date:** [July 21, 2025, 10:30pm UTC](https://forums.rocket.chat/t/slack-import-shows-messages-transferred-but-channels-are-empty/22358/1 "2025-07-21T22:30:01Z")

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Hey Rocket Community,

This is my first post, so I apologize if this topic has been addressed. I am having issues with importing my Slack data to Rocket.Chat. The Import page states that the channels, users, and **17,995 messages** were successfully transferred. I can confirm that the **channels and users** are present in the workspace. However, **none of the messages** appear in any of the imported channels — they are all empty.

Below are the steps that I took to import the Slack data:

Slack Export

- Exported our Slack workspace from Slack Admin → Settings → Import/Export Data.
- Received a ZIP file containing:
- channels/ folders with messages.json
- users.json
- Other metadata

Preparing for Import

- Verified the Slack export was in standard Slack JSON format.
- Reviewed users.json to ensure user data was complete.
- I did not modify message files, and the messages.json appeared valid with expected message structures.

Rocket.Chat Import Steps

- In Rocket.Chat: Administration \> Workspace \> Import.
- I chose Slack as the import source.
- Uploaded the Slack export ZIP.
- Channels and users were successfully imported and visible in the workspace.
- Issue: No messages appeared in the imported channels. All channels were empty, but the import page states that the 17,995 messages were imported.

Looking for Guidance

- Has anyone run into this issue before?
- Are there known issues with message visibility after Slack import?
- Where can I find logs to debug what the importer actually processed or skipped?

Any help would be appreciated, and I am happy to provide sanitized sample JSON or logs if needed.

Thanks!

### Server Setup Information

- Version of Rocket.Chat Server: 7.8.0
- Operating System: Ubuntu
- Deployment Method: Docker
- Number of Running Instances: 1
- DB Replicaset Oplog: N/A
- NodeJS Version: v22.14.0
- MongoDB Version: 7.0.15 / wiredTige
- Proxy: Nginx
- Firewalls involved: Yes

### Any additional Information

| Import Type | Last Updated | Last Status | File | Users | Contacts | Channels | Messages | Total |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Slack | July 15, 2025 11:34 AM | Completed successfully | slack-data-formatted.zip | 68 | 0 | 5 | 17,995 | 18,068 |

 ![image](https://us1.discourse-cdn.com/flex021/uploads/rocketchat/original/2X/f/fdbead1c862a6612d89a6934deaa03ee24fc941e.png)

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**Author:** ![reetp](https://sea1.discourse-cdn.com/flex021/user_avatar/forums.rocket.chat/reetp/32/5546_2.png) [@reetp](https://forums.rocket.chat/u/reetp)\
**Post date:** [July 22, 2025, 8:14am UTC](https://forums.rocket.chat/t/slack-import-shows-messages-transferred-but-channels-are-empty/22358/2 "2025-07-22T08:14:26Z")

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I have seen other issue here or in github.

Have a good search.

Rocket is ultra fussy about imports.

Check your logs for errors.

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**Author:** ![joel1231](https://avatars.discourse-cdn.com/v4/letter/j/a587f6/32.png) [@joel1231](https://forums.rocket.chat/u/joel1231)\
**Post date:** [July 22, 2025, 6:17pm UTC](https://forums.rocket.chat/t/slack-import-shows-messages-transferred-but-channels-are-empty/22358/3 "2025-07-22T18:17:32Z")

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Hey Reetp,

Thanks for the response. I checked the logs, and I noticed that the logs seem to mention that the imported message has channels. Below is a small snippet of the logs that I found.

Thanks,

{“level”:40,“time”:“2025-07-22T17:13:26.419Z”,“pid”:1,“hostname”:“\<container\_id\>”,“name”:“Slack Importer”,“msg”:“Mentioned room not found: thanksjosh”}  
{“level”:40,“time”:“2025-07-22T17:13:26.433Z”,“pid”:1,“hostname”:“\<container\_id\>”,“name”:“Slack Importer”,“msg”:“Mentioned room not found: blameslack”}  
{“level”:40,“time”:“2025-07-22T17:13:24.303Z”,“pid”:1,“hostname”:“\<container\_id\>”,“name”:“Slack Importer”,“msg”:“Mentioned user not found: hufflepuff”}  
{“level”:40,“time”:“2025-07-22T17:13:25.135Z”,“pid”:1,“hostname”:“\<container\_id\>”,“name”:“Slack Importer”,“msg”:“Mentioned room not found: ShortFatDogProblems”}  
{“level”:40,“time”:“2025-07-22T17:13:25.274Z”,“pid”:1,“hostname”:“\<container\_id\>”,“name”:“Slack Importer”,“msg”:“Mentioned room not found: clips”}

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<div class="post-metadata">

**Author:** ![reetp](https://sea1.discourse-cdn.com/flex021/user_avatar/forums.rocket.chat/reetp/32/5546_2.png) [@reetp](https://forums.rocket.chat/u/reetp)\
**Post date:** [July 22, 2025, 9:34pm UTC](https://forums.rocket.chat/t/slack-import-shows-messages-transferred-but-channels-are-empty/22358/4 "2025-07-22T21:34:39Z")

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> [@joel1231](#):
>
> Mentioned room not found: thanksjosh”}

> [@joel1231](#):
>
> Mentioned user not found: hufflepuff”}

At a guess these sort of errors are the root of your issue and need fixing.