Name cannot be found in the name scope of 'System.Windows.Controls.Button'

Question

I have the following Template for my Button

Answer 1

The problem is indeed caused by the ItemsControl which makes the Button and its resources in a different scope.

A simple fix would be, instead of using Storyboard.TargetName, use Storyboard.Target binding instead, something like this -

Storyboard.Target="{Binding ElementName=col1}"

Answer 2

Try using x:Name instead of Name in

<ColumnDefinition Name="col1" Width="{Binding ElementName=root, Path=DataContext.gla.LeftGridWidth}" />