# "Connection lost" on a specific dashboard tab
**URL:** https://discourse.nodered.org/t/connection-lost-on-a-specific-dashboard-tab/71780
**Category:** Dashboard
**Created:** [6 December 2022 17:49 UTC](https://discourse.nodered.org/t/connection-lost-on-a-specific-dashboard-tab/71780 "2022-12-06T17:49:40Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@jbudd](https://discourse.nodered.org/u/jbudd)
#### Post date: [6 December 2022 17:49 UTC](https://discourse.nodered.org/t/connection-lost-on-a-specific-dashboard-tab/71780/1 "2022-12-06T17:49:40Z")
I currently have three dashboard tabs.
One of them draws a chart with 4 lines using data from MySQL.
When I switch to this tab using the dashboard hamburger menu:
- A mesage pops up "Connection lost" for a second.
- Same message once more.
- ~ 5sec delay.
- The graph is displayed.
I'm struggling to identify the cause.
It seems not to be a problem in the SQL query or drawing the graph. If I add a button to repeat the query it redraws the graph instantly.
The graph has 4 lins, each with about 40 points.
Every time I deploy this flow the Mysql node status is "not yet connected" & I get this error on the node-red-dashboard node (ui\_base)
A snippet of the Node-red log:
```auto
6 Dec 17:26:40 - [info] Starting flows
6 Dec 17:26:40 - [error] [ui_base:70ea48b6c7ce5aec] TypeError: Cannot read properties of undefined (reading 'replace')
6 Dec 17:26:40 - [info] [cronplus:8ee84f7bf63b1027] createTask - [truncated irrelevant]
6 Dec 17:26:40 - [info] Started flows
6 Dec 17:26:40 - [error] [mysql:b558a28a8cbd9b7e] Database not connected
6 Dec 17:26:40 - [info] [mqtt-broker:754230cc.99c44] Connected to broker: mqtt://localhost:1883
```
Can anyone suggest where to look for the cause?
---
### Author:  [@bakman2](https://discourse.nodered.org/u/bakman2)
#### Post date: [6 December 2022 18:49 UTC](https://discourse.nodered.org/t/connection-lost-on-a-specific-dashboard-tab/71780/2 "2022-12-06T18:49:02Z")
> Every time I deploy this flow the Mysql node status is "not yet connected"
Because your inject node will inject immediately after deploy before the mysql node is actually connected ?
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### Author:  [@jbudd](https://discourse.nodered.org/u/jbudd)
#### Post date: [6 December 2022 19:04 UTC](https://discourse.nodered.org/t/connection-lost-on-a-specific-dashboard-tab/71780/3 "2022-12-06T19:04:48Z")
Yes, that probably explains that, so it's not a symptom of the actual problem.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [5 January 2023 19:05 UTC](https://discourse.nodered.org/t/connection-lost-on-a-specific-dashboard-tab/71780/4 "2023-01-05T19:05:34Z")
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