Runtime error with column default value settings

Question

I have one SP2010 (enterprise) document library which gives me a runtime error if I click on "column default value settings" in the settings. Other document libraries' column default value settings are working fine. I use managed metadata
and created libraries from templates. I deleted all custom columns from the site, only title is left over (content types are document and link to a document) but runtime error still shows up. How can I fix this?
Server Error in '/' Application.
Description:
An application error occurred on the server. The current custom error
settings for this application prevent the details of the application error from
being viewed remotely (for security reasons). It could, however, be viewed by
browsers running on the local server machine.
Details: To enable
the details of this specific error message to be viewable on remote machines,
please create a <customErrors> tag within a "web.config" configuration
file located in the root directory of the current web application. This
<customErrors> tag should then have its "mode" attribute set to
"Off".
<!-- Web.Config Configuration File -->
<configuration>
<system.web>
<customErrors mode="Off"/>
</system.web>
</configuration>
Notes:
The current error page you are seeing can be replaced by a custom error page by
modifying the "defaultRedirect" attribute of the application's
<customErrors> configuration tag to point to a custom error page
URL.
<!-- Web.Config Configuration File -->
<configuration>
<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
</system.web>
</configuration>
Runtime Error

Answer 1

Thanks for your suggestions. I found the log but don't know what it means. Can anybody help?
System.ArgumentOutOfRangeException:   startIndex cannot be larger than length of string. Parameter name: startIndex  
  at System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length,   Boolean fAlwaysCopy)
  at   Microsoft.Office.DocumentManagement.MetadataNavigation.PerLocationViewManager.HumanReadablePath(SPList   list, Guid fieldId, String uniqueNodeId, String pathDelimiter)
  at   Microsoft.Office.Server.WebControls.MetaDataNavTree.TreeViewDataBound(Object   sender, EventArgs e)
  at System.Web.UI.WebControls.BaseDataBoundControl.OnDataBound(EventArgs e)
  at System.Web.UI.WebControls.HierarchicalDataBoundControl.PerformSelect()
  at   Microsoft.Office.DocumentManagement.MetadataNavigation.MetadataNavigationContext.OnTreeViewLoad(SPTreeView   spTreeView)
  at Microsoft.Office.Server.WebControls.MetaDataNavTree.PerLocationPageLoad()
  at   Microsoft.Office.DocumentManagement.Pages.ColumnDefaultsPage.OnLoad(EventArgs   e)
  at System.Web.UI.Control.LoadRecursive()
  at System.Web.UI.Page.ProcessRequestMain(Boolean   includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)