Hi Sean,

Did you comment out the ClientLogin properties in your App.config?
There should be following properties.

   <!-- Settings specific to use ClientLogin as authentication mechanism. 
-->
    <!-- To use ClientLogin as authentication mechanism, uncomment the 
following
         section and comment the OAuth2 section above. Keep in mind that
         ClientLogin API is deprecated, and its use is strongly discouraged.
         See 
https://developers.google.com/accounts/docs/AuthForInstalledApps
         for details.-->
    <!--
    <add key="AuthorizationMethod" value="ClientLogin" />
    <add key="Email" value="INSERT_YOUR_LOGIN_EMAIL_HERE"/>
    <add key="Password" value="INSERT_YOUR_PASSWORD_HERE"/>
    -->
    <!-- Optional: uncomment this if you want to reuse an authToken multiple
         times. -->
    <!-- <add key="AuthToken" value="INSERT_YOUR_AUTH_TOKEN_HERE"/> -->

Best,
- Takeshi, AdWords API Team

On Wednesday, November 6, 2013 4:58:37 AM UTC+9, Sean wrote:
>
> I understand ClientLogin is deprecated, but we have over 250 accounts that 
> we manage and cannot move all to oAuth until we figure out how to nest 
> their mcc accounts under our agency's. I just downloaded the v201309 DotNet 
> clientLibraries and updated the references. I am now getting the following 
> error: 
>  
> Value cannot be null. Parameter name: Looks like your application is not 
> configured to use OAuth2 properly. Required OAuth2 parameter RefreshToken 
> is missing. You may run Common\\Utils\\OAuth2TokenGenerator.cs to generate 
> a default OAuth2 configuration.
>  
> I tried adding the following to my app.config, but it still gets the same 
> error.
>  
> <configSections>
>     <section name="AdWordsApi" 
> type="System.Configuration.DictionarySectionHandler" />
>   </configSections>
> <AdWordsApi>
>  <add key="AuthorizationMethod" value="ClientLogin" />
> </AdWordsApi>
>  
> Please help this is crucial, as all of our processes will fail unless i 
> now roll back the dlls.
>

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