Erro ao tentar efetuar o download de um arquivo anexado a um processo

Criado por wilton.souza@... em 8/31/2018

Em um processo já criado, após efetuarmos o upload de um arquivo (neste caso .pdf), se tentarmos fazer o download do mesmo ocorre o seguinte erro:

"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: The base class includes the field 'IfrPdfJs', but its type (System.Web.UI.HtmlControls.HtmlIframe) is not compatible with the type of control (System.Web.UI.HtmlControls.HtmlGenericControl).

Source Error:

Line 47:

Line 48:         <asp:View runat="server">

Line 49:             <iframe runat="server" id="IfrPdfJs"  style="position: absolute; height: 100%; width: 100%; border: none;" frameborder="0" />

Line 50:         </asp:View>

Line 51:

Source File: /workflow/wfdocument_viewer.aspx    Line: 49

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.2053.0"

Já verifiquei o pool no IIS e está usando o .NET CLR Version v4.0.30319

Windows 2012 R2. Isto ocorre em todos os browses (IE, Chrome e Firefox)