# ToolTip - ToolTip Show - NavigateTo -- Cannot read property 'removeChild' of null

**URL:** <https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466>\
**Category:** Radzen.Blazor Components\
**Created:** [October 29, 2020, 8:40am UTC](https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466 "2020-10-29T08:40:13Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Agefer](https://forum.radzen.com/user_avatar/forum.radzen.com/agefer/32/3308_2.png) [@Agefer](https://forum.radzen.com/u/Agefer)\
**Post date:** [October 29, 2020, 8:40am UTC](https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466/1 "2020-10-29T08:40:13Z")

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Dear Radzen Team,

Faced a strange problem while using ToolTip.

If on the page called open ToolTip.  
And then click on the button with NavigateTo, then an exception occurs.

If ToolTip was not shown, then this problem does not arise.

 ![CaptureToolTip](https://forum.radzen.com/uploads/default/original/2X/5/5b5324ae614c2273559c230dd3c48ae236d1e568.png)

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**Author:** ![Agefer](https://forum.radzen.com/user_avatar/forum.radzen.com/agefer/32/3308_2.png) [@Agefer](https://forum.radzen.com/u/Agefer)\
**Post date:** [May 18, 2022, 1:20pm UTC](https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466/2 "2022-05-18T13:20:35Z")

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Sometimes there is such an exception. But I can't catch her.

 ![Screenshot 2022-05-18 162148](https://forum.radzen.com/uploads/default/original/2X/d/d91e741c71082fdc30768ea31597383d86e32d8f.png)

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**Author:** ![ggrewe](https://forum.radzen.com/user_avatar/forum.radzen.com/ggrewe/32/5959_2.png) [@ggrewe](https://forum.radzen.com/u/ggrewe)\
**Post date:** [July 9, 2022, 12:40pm UTC](https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466/3 "2022-07-09T12:40:18Z")

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I have had a very similar experience. What I have done is call TooltipService.Dispose() before calling any navigation. Sometimes this works, sometimes it does not.

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**Author:** ![Duane\_Pfeiffer](https://forum.radzen.com/user_avatar/forum.radzen.com/duane_pfeiffer/32/9943_2.png) [@Duane\_Pfeiffer](https://forum.radzen.com/u/Duane_Pfeiffer)\
**Post date:** [November 3, 2022, 3:32pm UTC](https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466/4 "2022-11-03T15:32:37Z")

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I'm having this problem when I include the tool tip service in more than one layout. Tried tooltipservice.Dispose() but still get the error. Help please!

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**Author:** ![Duane\_Pfeiffer](https://forum.radzen.com/user_avatar/forum.radzen.com/duane_pfeiffer/32/9943_2.png) [@Duane\_Pfeiffer](https://forum.radzen.com/u/Duane_Pfeiffer)\
**Post date:** [November 3, 2022, 3:54pm UTC](https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466/5 "2022-11-03T15:54:15Z")

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I was able to solve the problem by adding the mouse leave event to my button.

```
    <RadzenButton Icon="engineering" Text="Maintenance" Click="AddMaintenanceEvent" Style="margin-bottom:3px;"
                  MouseEnter="@(args => ShowTooltip(args, new TooltipOptions(){ Text = "Add Maintenance Event" }))"
                  MouseLeave="@(args => tooltipService.Close())" />

```

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**Author:** ![Agefer](https://forum.radzen.com/user_avatar/forum.radzen.com/agefer/32/3308_2.png) [@Agefer](https://forum.radzen.com/u/Agefer)\
**Post date:** [November 3, 2022, 7:28pm UTC](https://forum.radzen.com/t/tooltip-tooltip-show-navigateto-cannot-read-property-removechild-of-null/5466/6 "2022-11-03T19:28:28Z")

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Yes. Also noticed that if the layouts change, then the problem occurs 100%. But unfortunately I couldn't find a solution.