UIElementLibrary is not used in this Component (Hint: Add UIElementLibrary)
I get the following error when i build a DC
[wdgen] [Error] com.ltil.mdm.mcr.approve2.MCRApproveView2 --> UIElement MessageArea [Pattern]: UIElementLibrary is not used in this Component (Hint: Add UIElementLibrary)
there is a message area in my layout. Do I have to add anything in my component because I have added the message area ?
Try this: In the "Web Dynpro Explorer", right-click on the component and select "Edit UI Element Library Reference". Check if the entry for the "Pattern" library is selected.