diff --git a/Ashx/SIGWeb.ashx b/Ashx/SIGWeb.ashx
index 986094a69..890fd766c 100644
--- a/Ashx/SIGWeb.ashx
+++ b/Ashx/SIGWeb.ashx
@@ -380,7 +380,7 @@ Public Class SIGWeb : Implements IHttpHandler, IRequiresSessionState
 
             End If
 
-            If usuario.Empresa.Funcionalidad(558) = "1" Then
+            If usuario.Empresa.Funcionalidad(558) = "1" AndAlso DtPSRetorno IsNot Nothing Then
                 Try
                     Dim NombreFiltroColumna As String = DtPSRetorno.Columns(3).ColumnName
                     DtPSRetorno = DtPSRetorno.FiltraParametros("", String.Format("{0} DESC,PSCodigo", NombreFiltroColumna))