Server Error in '/' Application.

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: There can be only one 'master' directive.

Source Error:


Line 2:  
Line 3:  <asp:Content ContentPlaceHolderID="umbMasterContentPlaceHolder" runat="server">
Line 4:  <%@ Master Language="C#" MasterPageFile="~/masterpages/umbMaster.master" AutoEventWireup="true" %>
Line 5:  <asp:Content ID="Content1" ContentPlaceHolderID="cp_content" runat="server">
Line 6:  <div id="subNavigation">

Source File: /masterpages/Letter.master    Line: 4


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0