Answers.Body: <p>So turns out it was an issue with an older plugin, DashCols. As soon as I disabled it things worked fine.  </p>
  
  <p>Unsurprising in hindsight!</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-01-17T04:27:56.247Z
Answers.LastActivityDate: 2016-01-17T04:27:56.247Z
Answers.UserDisplayName: Keith Mancuso
Body: <p>For some reason whenever I add a custom column to a section's entry list I'm getting errors and no values.</p>
  
  <p>If I add Entry Type to the column list, for example, it's saying:</p>
  
  <pre><code>Unknown class: Craft\EntryTypeModel
  </code></pre>
  
  <p>And links are saying:</p>
  
  <pre><code>Unknown class: Twig_Markup
  </code></pre>
  
  <p><a href="https://i.sstatic.net/Rc6gL.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/Rc6gL.png" alt="screenshot of errors"></a></p>
  
  <p>I'm a little dumbfounded?  I tried removing and re-adding them and still no luck.  Any ideas?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-01-17T03:31:21.983Z
Comments.Text: Weird... I'd guess you're missing some `craft/app` files.  Can you try replacing your existing `craft/app` folder with a fresh one downloaded from https://craftcms.com?
Comments.UserDisplayName: Brad Bell
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-01-17T03:31:58.357Z
Comments.Text: Yea I tried that too, no luck?
Comments.UserDisplayName: Keith Mancuso
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-01-17T03:33:23.287Z
Comments.Text: Can you verify `craft/app/models/EntryTypeModel.php` exists and its permissions are such that PHP can read it?
Comments.UserDisplayName: Brad Bell
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-01-17T03:34:10.193Z
Comments.Text: If all that checks out, can you look in `craft/storage/runtime/logs` find the error and edit the original question to include the full stack trace for it?
Comments.UserDisplayName: Brad Bell
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-01-17T03:44:51.380Z
Comments.Text: Ugh, im an idiot i had an old Plugin installed "DashCols" that was what was causing it of course.  Sorry!
Comments.UserDisplayName: Keith Mancuso
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-01-17T03:48:58.450Z
Comments.Text: Hah... no worries!  Mind adding that as the official answer?
Comments.UserDisplayName: Brad Bell
Tags: <entrymodel>
Title: Columns on the Entry index page giving errors
ThreadText: # Columns on the Entry index page giving errors
  
  (Asked by: username_0 on 2016-01-17)
  
  For some reason whenever I add a custom column to a section's entry list I'm getting errors and no values.
  
  If I add Entry Type to the column list, for example, it's saying:
  
  ```
  Unknown class: Craft\EntryTypeModel
  
  ```
  
  And links are saying:
  
  ```
  Unknown class: Twig_Markup
  
  ```
  
  [![screenshot of errors](https://i.sstatic.net/Rc6gL.png)](https://i.sstatic.net/Rc6gL.png)
  
  I'm a little dumbfounded? I tried removing and re-adding them and still no luck. Any ideas?
  
  **Tags:** entrymodel
  
  > **Comments:**
  > **username_1**: Weird... I'd guess you're missing some `craft/app` files.  Can you try replacing your existing `craft/app` folder with a fresh one downloaded from https://craftcms.com?  
  > **username_0**: Yea I tried that too, no luck?  
  > **username_1**: Can you verify `craft/app/models/EntryTypeModel.php` exists and its permissions are such that PHP can read it?  
  > **username_1**: If all that checks out, can you look in `craft/storage/runtime/logs` find the error and edit the original question to include the full stack trace for it?  
  > **username_0**: Ugh, im an idiot i had an old Plugin installed "DashCols" that was what was causing it of course.  Sorry!  
  > **username_1**: Hah... no worries!  Mind adding that as the official answer?  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2016-01-17. Score: 2 | Accepted answer
  
  So turns out it was an issue with an older plugin, DashCols. As soon as I disabled it things worked fine.
  
  Unsurprising in hindsight!
  
  
  ---
  
  