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Unable to Instantiate Module - SharePoint Error

Posted by Bhushan Gawale Articles | SharePoint 2010 February 15, 2011
Here you will see how to solve the Unable to Instantiate Module - SharePoint Error.
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Have you ever encountered the error? I have .. and solved it.

This error is basically related to the module element and usually exists when you try to provision a file to the SharePoint site which never exists in the physical path / file system of the server.

Here is a sample case:

I am trying to provision a page named stylish.aspx to pages library same as default.aspx in onet.xml

<Module Name="SampleModule" Url="$Resources:cmscore,List_Pages_UrlName;" Path="">

<File Url="Default.aspx" NavBarHome="false" Type="GhostableInLibrary">
  <Property Name="Title" Value="My Default Page" />
  <Property Name="PublishingPageLayout" Value="~SiteCollection/_catalogs/masterpage/MyPageLayout.aspx,
~SiteCollection/_catalogs/masterpage/MyPageLayout.aspx;
" />
  <Property Name="ContentType" Value="$Resources:cmscore,contenttype_page_name;" />
</File>

<File Url="Stylish.aspx" NavBarHome="false" Type="GhostableInLibrary">
<Property Name="Title" Value="My Stylish Page" />
<Property Name="PublishingPageLayout"
Value="~SiteCollection/_catalogs/masterpage/ MyPageLayout.aspx, ~SiteCollection/_catalogs/masterpage/MyPageLayout.aspx" />
<Property Name="ContentType" Value="$Resources:cmscore,contenttype_page_name;" />
</File>
</Module>

If you try the preceding case then you will get the error, unable to instantiate module.

Well what's the problem?

Yes, I was trying to add page named Stylish.aspx with virtual url Stylish.aspx that did not exist.

If you open any site template directory under [14]\Layouts\Template\SiteTemplate then you will find default.aspx and that's the reason why SharePoint needs that SharePoint searches file named default.aspx on file system and then provisions file to SharePoint site.

Solution:

So the error can be solved by using a Name attribute of the File Element.

<Module Name="SampleModule" Url="$Resources:cmscore,List_Pages_UrlName;" Path="">

<File Url="Default.aspx" NavBarHome="false" Type="GhostableInLibrary">
  <Property Name="Title" Value="My Default Page" />
  <Property Name="PublishingPageLayout" Value="~SiteCollection/_catalogs/masterpage/MyPageLayout.aspx, ~SiteCollection/_catalogs/masterpage/MyPageLayout.aspx;" />
  <Property Name="ContentType" Value="$Resources:cmscore,contenttype_page_name;" />
</File>

<File Name="Stylish.aspx" Url="Default.aspx" NavBarHome="false" Type="GhostableInLibrary">
<Property Name="Title" Value="My Stylish Page" />
<Property Name="PublishingPageLayout"
Value="~SiteCollection/_catalogs/masterpage/ MyPageLayout.aspx, ~SiteCollection/_catalogs/masterpage/MyPageLayout.aspx" />
<Property Name="ContentType" Value="$Resources:cmscore,contenttype_page_name;" />
</File>
</Module>
  

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