Umbraco - Object reference not set..

Monday, March 08, 2010 by Sebastiaan Janssen

Today, I had a little problem after adding some properties to a document type in Umbraco. I've had this problem before and I keep forgetting how to fix it.

When opening a node of this document type (in Umbraco's Content area, not the document type editor), I get the following (rather generic) error:

server_error

I must add that while creating some new properties on this document type, the property was added, but I did get and SQL time-out. Not sure why that was, but it must have interupted an update process on existing nodes.

This is probably the reason that the current nodes are now corrupt. As you can see in the exception, there was a problem adding a control to the page.

The solution is easy, you have to publish all of the nodes and its subpages to fix the error. Voliá!

Richard Soeteman adds some extra information on a similar error while deleting a property on a document type. The issues could be related, so if you still have problems, check out his blog post as well.

Share this post:

| More

2 comment(s) for “Umbraco - Object reference not set..”

  1. Gravatar of Lee
    Lee Says:
    Tuesday, March 09, 2010We had this problem as well a few months back, another quick fix is to either touch the web.config so the application restarts/rebuilds and it will disapear (Or more long winded restart IIS)
  2. Gravatar of Sebastiaan Janssen
    Sebastiaan Janssen Says:
    Tuesday, March 09, 2010Thanks Lee, I should've mentioned in the post that a recycle of the application pool is the first thing I tried. Sometimes, IIS is just messing with you. However, seeing as though I got the SQL time-out first, it seemed unlikely that a recycle would fix it (and it didn't).

    But, absolutely, try a recycle first!

Leave comment:

Name (required):
E-mail (required, used to get your Gravatar):
Website:
Comment (required):
To make sure that you are human, please enter
both words below (required):