Enable animation with blend using property binding condition <p>I am working with blend 4, I am trying to play some StoryBoard using ControlStoryBoardAction with the contidion: if a specific Border Element in my UC has greater width then 250.</p> <p>I set the next configuration: <img src="https://i.stack.imgur.com/KGs2g.png" alt="Set data binding"></p> <p><img src="https://i.stack.imgur.com/Zm5Cb.png" alt="Config ControlStoryBoardAction "></p> <p>And when I run my application I am getting the following error:</p> <p>LeftOperand of type "OpeningViewModel" cannot be used with operator "GreaterThan". Source=Microsoft.Expression.Interactions</p> <p>What I am doing wrong? How can I launch StoryBoard with element property condition?</p>