I tried to find a similar issue but was not able to.

Would appreciate the all the help.

I am in the process of upgradeing from 4.61. to 4.7.1. I made a copy of the my prod site on a dev environment and followed the upgrade instructions.

I am able to get the full site working fine, front and back end except that some of the pages are not displaying the content for the same doc type.

for example, I have a doctype called fullwidthpage which has genereic properties and content properties. The generic properties are working fine byut the content property is not displaying on some of the pages. And this is where I am not able to solve the issue.

The page loads fine & all generic properties are there but the content does not show, When I enable debuging I see the following error:

Error rendering Item 4 (NodeId '' : mainContent).
The relative virtual path '="' is not allowed here.
at System.Web.VirtualPath.Create(String virtualPath, VirtualPathOptions options)
at System.Web.VirtualPathUtility.ToAbsolute(String virtualPath, String applicationPath)
at umbraco.IO.IOHelper.ResolveUrl(String virtualPath)
at umbraco.IO.IOHelper.ResolveUrlsFromTextString(String text)
at umbraco.presentation.templateControls.ItemRenderer.Render(Item item, HtmlTextWriter writer)

This error happens only on the pages with same doc type where content does not show.

Thanks in advance if you can help me figuring out this issue.