Fix Event ID# 7043 Load control template file /_controltemplates/TaxonomyPicker.ascx failed: Could not load type

This is an error that's a little misleading. At first it might seem that the file is missing or that there is a permissions issue, but that's not the case. The problem is that there is a bad charater in the template file.

Log Name:      Application

Source:        Microsoft-SharePoint Products-SharePoint Foundation

Date:          3/6/2013 1:07:44 PM

Event ID:      7043

Task Category: Web Controls

Level:         Error

Keywords:     

User:          DOMAIN\farm-admin

Computer:      sharepoint-server.domain.local

Description:

Load control template file /_controltemplates/TaxonomyPicker.ascx failed: Could not load type 'Microsoft.SharePoint.Portal.WebControls.TaxonomyPicker' from assembly 'Microsoft.SharePoint.Portal, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e4bce131e9439c'.

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Microsoft-SharePoint Products-SharePoint Foundation" Guid="{6fb3e0cd-51e7-47ed-897a-241364937fc2}" />

    <EventID>7043</EventID>

    <Version>14</Version>

    <Level>2</Level>

    <Task>15</Task>

    <Opcode>0</Opcode>

    <Keywords>0x4000000000000000</Keywords>

    <TimeCreated SystemTime="2013-03-06T19:07:44.430Z" />

    <EventRecordID>143232</EventRecordID>

    <Correlation ActivityID="{EB866783-7CC2-4A8F-849D-D9551A56B66A}" />

    <Execution ProcessID="1508" ThreadID="6256" />

    <Channel>Application</Channel>

    <Computer>sharepoint-server.domain.local</Computer>

    <Security UserID="S-1-5-21-etc." />

  </System>

  <EventData>

    <Data Name="string0">Load control template file /_controltemplates/TaxonomyPicker.ascx failed: Could not load type 'Microsoft.SharePoint.Portal.WebControls.TaxonomyPicker' from assembly 'Microsoft.SharePoint.Portal, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c'.</Data>

  </EventData>

</Event>

To fix this, open up C:\Program Files\Common Files\ Microsoft Shared\Web Server Extensions\14\TEMPLATE\ControlTemplates\TaxonomyPicker.ascx in notepad. Search for &#44 and replace it with a comma. Then save the file and do an iisreset. Problem solved.