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    <title>topic Re: Build Failed - Failed to register Add-in in ArcObjects SDK Questions</title>
    <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20287#M494</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;BLOCKQUOTE class="jive-quote"&gt;The build output doesn't give much clue. Can you try the esriRegAddIn utility in a cmd prompt without the silent flag and see if it gives you more information? For example,&lt;BR /&gt; &lt;BR /&gt;cd \Program Files\Common Files\ArcGIS\bin&lt;BR /&gt;esriRegAddin.exe "C:\VisualStudio\Projects\CustomUIElements\CustomUIElements\bin\Release\CustomUIElements.esriAddIn"&lt;BR /&gt; &lt;BR /&gt;There can be error in the config.esriaddinx file or ArcGIS not installed properly. Do you have Desktop installed?&lt;/BLOCKQUOTE&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Hi, thanks for your response.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Yes I have ArcGIS Desktop installed (Full install)&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I ran the esriRegAddIn from a cmd prompt, and I get this message:&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;ESRI ArcGIS Add-In Installation Utility&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Installation failed.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Access is denied. The specified add-in file may be in use.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;OK&amp;nbsp;&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;As far as I know the add-in file is not in use.&amp;nbsp; I have just restarted my computer, don't have Visual Studio or ArcGIS running, but I get that message.&amp;nbsp; The files are all local to this computer, and I am admin so it shouldn't be an access/permissions issue.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I have run a Repair on the .net sdk, should do the same for ArcMap?&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I will also try uninstalling then reinstalling the sdk now.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Mike.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Sun, 12 Sep 2010 18:43:07 GMT</pubDate>
    <dc:creator>MikeLouwrens</dc:creator>
    <dc:date>2010-09-12T18:43:07Z</dc:date>
    <item>
      <title>Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20285#M492</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;I have been going through the Add-in &lt;/SPAN&gt;&lt;A href="http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/Walkthrough_Building_custom_UI_elements_using_add_ins/0001000001ms000000/" rel="nofollow noopener noreferrer" target="_blank"&gt;walkthrough&lt;/A&gt;&lt;SPAN&gt; and when I try to Build I get an error "Failed to register Add-in 'CustomUIElements.esriAddIn'"&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;This is the Build Output:&lt;/SPAN&gt;&lt;BR /&gt;&lt;PRE class="lia-code-sample line-numbers language-none"&gt;&lt;SPAN style="font-size:1;"&gt;
------ Build started: Project: CustomUIElements, Configuration: Release Any CPU ------
C:\WINDOWS\Microsoft.NET\Framework\v3.5\Csc.exe /noconfig /nowarn:1701,1702 /errorreport:prompt /warn:4 /define:TRACE /reference:C:\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.ArcMapUI.dll /reference:C:\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.Carto.dll /reference:C:\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.Desktop.AddIns.dll /reference:C:\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.Display.dll /reference:C:\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.Framework.dll /reference:C:\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.Geometry.dll /reference:C:\ArcGIS\DeveloperKit10.0\DotNet\ESRI.ArcGIS.System.dll /reference:"c:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll" /reference:"c:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Data.DataSetExtensions.dll" /reference:C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.Data.dll /reference:C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.dll /reference:C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.Drawing.dll /reference:C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.Windows.Forms.dll /reference:C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /reference:"c:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Xml.Linq.dll" /debug:pdbonly /filealign:512 /optimize+ /out:obj\Release\CustomUIElements.dll /target:library Properties\AssemblyInfo.cs ZoomToLayerButton.cs AddGraphicsTool.cs Config.Designer.cs
Compile complete -- 0 errors, 0 warnings
CustomUIElements -&amp;gt; C:\VisualStudio\Projects\CustomUIElements\CustomUIElements\bin\Release\CustomUIElements.dll
Successfully created Add-in "CustomUIElements" -&amp;gt; 'C:\VisualStudio\Projects\CustomUIElements\CustomUIElements\bin\Release\CustomUIElements.esriAddIn'.
esriRegAddin.exe "C:\VisualStudio\Projects\CustomUIElements\CustomUIElements\bin\Release\CustomUIElements.esriAddIn" /s
C:\Program Files\MSBuild\ESRI\ESRI.ArcGIS.AddIns.targets(125,5): error : Failed to register Add-in 'CustomUIElements.esriAddIn'.
Done building project "CustomUIElements.csproj" -- FAILED.
========== Build: 0 succeeded or up-to-date, 1 failed, 0 skipped ==========
&lt;/SPAN&gt;&lt;/PRE&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Software:&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Visual Studio 2008&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;ArcGIS 10&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;XP Pro 32bit&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I didn't use the sample data, just followed the walkthrough and ran Build when it told me to ("Installing the custom button and tool" section)&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Any ideas on what's happening?&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Cheers,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Mike.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Fri, 10 Dec 2021 20:48:25 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20285#M492</guid>
      <dc:creator>MikeLouwrens</dc:creator>
      <dc:date>2021-12-10T20:48:25Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20286#M493</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;The build output doesn't give much clue. Can you try the esriRegAddIn utility in a cmd prompt without the silent flag and see if it gives you more information? For example,&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;cd \Program Files\Common Files\ArcGIS\bin&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;esriRegAddin.exe "C:\VisualStudio\Projects\CustomUIElements\CustomUIElements\bin\Release\CustomUIElements.esriAddIn"&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;There can be error in the config.esriaddinx file or ArcGIS not installed properly. Do you have Desktop installed?&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Fri, 10 Sep 2010 18:42:16 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20286#M493</guid>
      <dc:creator>EagerIp</dc:creator>
      <dc:date>2010-09-10T18:42:16Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20287#M494</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;BLOCKQUOTE class="jive-quote"&gt;The build output doesn't give much clue. Can you try the esriRegAddIn utility in a cmd prompt without the silent flag and see if it gives you more information? For example,&lt;BR /&gt; &lt;BR /&gt;cd \Program Files\Common Files\ArcGIS\bin&lt;BR /&gt;esriRegAddin.exe "C:\VisualStudio\Projects\CustomUIElements\CustomUIElements\bin\Release\CustomUIElements.esriAddIn"&lt;BR /&gt; &lt;BR /&gt;There can be error in the config.esriaddinx file or ArcGIS not installed properly. Do you have Desktop installed?&lt;/BLOCKQUOTE&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Hi, thanks for your response.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Yes I have ArcGIS Desktop installed (Full install)&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I ran the esriRegAddIn from a cmd prompt, and I get this message:&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;ESRI ArcGIS Add-In Installation Utility&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Installation failed.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Access is denied. The specified add-in file may be in use.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;OK&amp;nbsp;&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;As far as I know the add-in file is not in use.&amp;nbsp; I have just restarted my computer, don't have Visual Studio or ArcGIS running, but I get that message.&amp;nbsp; The files are all local to this computer, and I am admin so it shouldn't be an access/permissions issue.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I have run a Repair on the .net sdk, should do the same for ArcMap?&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I will also try uninstalling then reinstalling the sdk now.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Mike.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Sun, 12 Sep 2010 18:43:07 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20287#M494</guid>
      <dc:creator>MikeLouwrens</dc:creator>
      <dc:date>2010-09-12T18:43:07Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20288#M495</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;This may or may not be relevant, but if I try to install an add-in from the Customize dialog within ArcMap, I get a message that says something along the lines of "No UI Elements found"&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Mike.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Sun, 12 Sep 2010 18:45:07 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20288#M495</guid>
      <dc:creator>MikeLouwrens</dc:creator>
      <dc:date>2010-09-12T18:45:07Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20289#M496</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;I have uninstalled and reinstalled ArcGIS Desktop, and still have the same issue.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I now think this is something to do with ArcGIS Desktop, and not something wrong with my VS Project, as I have downloaded an ESRI Add-In (The new Water Editing Tools) and I get the same message when I try to install it:&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;ESRI ArcGIS Add-In Installation Utility&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Installation failed.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Access is denied. The specified add-in file may be in use.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;OK&amp;nbsp;&amp;nbsp; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;---------------------------&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;I think maybe I'll send this to Support, unless someone has come across this and has a solution? &lt;span class="lia-unicode-emoji" title=":slightly_smiling_face:"&gt;🙂&lt;/span&gt;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Cheers,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Mike.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Sun, 12 Sep 2010 21:14:37 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20289#M496</guid>
      <dc:creator>MikeLouwrens</dc:creator>
      <dc:date>2010-09-12T21:14:37Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20290#M497</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Looks like you cannot deploy any add-in at all on this particular machine &lt;span class="lia-unicode-emoji" title=":disappointed_face:"&gt;😞&lt;/span&gt; &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;The error message generally means during the file copy operation you don't have the correct permission to deploy the add-in to [My Documents]\ArcGIS\AddIns\Desktop10.0 folder. I know you've mentioned you have admin privileges but you may want to double check if you can write to that folder.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 13 Sep 2010 20:47:35 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20290#M497</guid>
      <dc:creator>EagerIp</dc:creator>
      <dc:date>2010-09-13T20:47:35Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20291#M498</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;BLOCKQUOTE class="jive-quote"&gt;Looks like you cannot deploy any add-in at all on this particular machine &lt;span class="lia-unicode-emoji" title=":disappointed_face:"&gt;😞&lt;/span&gt; &lt;BR /&gt;&lt;BR /&gt;The error message generally means during the file copy operation you don't have the correct permission to deploy the add-in to [My Documents]\ArcGIS\AddIns\Desktop10.0 folder. I know you've mentioned you have admin privileges but you may want to double check if you can write to that folder.&lt;/BLOCKQUOTE&gt;&lt;SPAN&gt;Is it possible to change that folder location?&amp;nbsp; I think it now all makes sense &lt;span class="lia-unicode-emoji" title=":slightly_smiling_face:"&gt;🙂&lt;/span&gt;&amp;nbsp; I have a quota on my MyDocuments folder, and I've passed it... I'll delete some files to see if that helps, but would be keen to change that location if possible??&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Thanks,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;Mike.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 13 Sep 2010 20:57:10 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20291#M498</guid>
      <dc:creator>MikeLouwrens</dc:creator>
      <dc:date>2010-09-13T20:57:10Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20292#M499</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;EsriRegAddin only deploys to the current user location at 10.0. Instead of typing the long command in a command prompt, it is more convenient to just double click the .esriAddIn file. It should spin up EsriRegAddin.exe and its wizard. See if this gives you more clue on what's wrong with the deployment.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 13 Sep 2010 22:14:04 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20292#M499</guid>
      <dc:creator>EagerIp</dc:creator>
      <dc:date>2010-09-13T22:14:04Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20293#M500</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;For me, my Documents and Settings is on a shared network drive.&amp;nbsp; This drive was full.&amp;nbsp; When I cleared some stuff out, registration worked.&amp;nbsp; Annoying!&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 03 Sep 2013 14:54:41 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20293#M500</guid>
      <dc:creator>RoyJackson1</dc:creator>
      <dc:date>2013-09-03T14:54:41Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20294#M501</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;If anyone still cares this could be a registry problem. That's how i resolved it anyways.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;There's some info on this page: &lt;/SPAN&gt;&lt;BR /&gt;&lt;A href="http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/Advanced_add_in_concepts/0001000004n7000000/"&gt;http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/Advanced_add_in_concepts/0001000004n7000000/&lt;/A&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Basically they tell you to change the BlockAddIns registry to 0. However, I found that the path they provided wasn't where my BlockAddIns registry is located. So if you can't find HKEY_LOCAL_MACHINE\SOFTWARE\ESRI\Desktop10.0\Settings try HKEY_LOCAL_MACHINE &amp;gt; SOFTWARE &amp;gt; Wow6432Node &amp;gt; ESRI &amp;gt; Desktop10.0 &amp;gt; Settings &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Hope this helps.&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 09 Oct 2013 15:26:20 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20294#M501</guid>
      <dc:creator>GraceCai</dc:creator>
      <dc:date>2013-10-09T15:26:20Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20295#M502</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;Hi All,&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;I experienced the same issue when trying to install the AttributeAssistant and WaterUtility Network Editing Tools in my Desktop version 10.2.&amp;nbsp; I received a pop-up with the following message:&amp;nbsp; Installation failed. Access is denied. The specified add-in file may be in use.&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;I was able to resolve this problem by putting the add-in installer files in the following directory:&amp;nbsp; C:\Program Files (x86)\ArcGIS\Desktop10.2\bin\Addins.&amp;nbsp; You can actually put the installer files in any directory and then add it through the the options dialog of the Customize -&amp;gt; Add-in Manager in ArcMap. &lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Well that worked for me anyway.&amp;nbsp; I hope it works for you too.&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;Regards,&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;gingerrc4&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Fri, 31 Jan 2014 21:00:08 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20295#M502</guid>
      <dc:creator>RobynGingerich</dc:creator>
      <dc:date>2014-01-31T21:00:08Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20296#M503</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;SPAN&gt;the problem is:&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;you look "Config.esriaddinx" in line &lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt; &amp;lt;Targets&amp;gt;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; &amp;lt;Target name="Desktop" version="10.0" /&amp;gt;&lt;/SPAN&gt;&lt;BR /&gt;&lt;SPAN&gt;&amp;nbsp; &amp;lt;/Targets&amp;gt;&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;the Solution&lt;/SPAN&gt;&lt;BR /&gt;&lt;BR /&gt;&lt;SPAN&gt;change the version API&lt;/SPAN&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 20 Mar 2014 15:41:47 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20296#M503</guid>
      <dc:creator>FabianHeredia</dc:creator>
      <dc:date>2014-03-20T15:41:47Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20297#M504</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;YES YES AND YES!!! Thank You!!!&amp;nbsp;&lt;A href="https://community.esri.com/people/robyn@edcgov"&gt;robyn@edcgov&lt;/A&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 14 Sep 2016 18:56:08 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20297#M504</guid>
      <dc:creator>deleted-user-amp86F9KgPL3</dc:creator>
      <dc:date>2016-09-14T18:56:08Z</dc:date>
    </item>
    <item>
      <title>Re: Build Failed - Failed to register Add-in</title>
      <link>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20298#M505</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;I recently had this issue where we were suddenly unable to use an add-in that we have had on a network folder for years with no problems. We made certain changes to the way we map our user's desktops/profiles, involving Sharepoint&amp;nbsp;directories.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Copying the add-in file to the Add-In folder on each users machine works for us! However, it only appears in ArcMap and not in Catalog for some reason. Windows 7, ArcGIS Desktop 10.5&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 08 Aug 2017 16:08:56 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcobjects-sdk-questions/build-failed-failed-to-register-add-in/m-p/20298#M505</guid>
      <dc:creator>Town_of_Fuquay-Varina_GIS</dc:creator>
      <dc:date>2017-08-08T16:08:56Z</dc:date>
    </item>
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