LINQ stored procedure

I'm calling a stored procedure through entityframework but I get an exception

When passing the parameters

exp="tblAdquiridosGe"

_cFiltros="'d.cNombre = ''DE'''"

 return contexto.uspBusquedaCliente(exp,_cFiltros)

But when I run the query directly in SQLSERVER it throws me information or simply if you do not find anything, it does not return anything.

Am I passing the values correctly?

Thank you in advance.

USE [GESTORIGECE]
GO
/****** Object:  StoredProcedure [dbo].[uspBusquedaCliente]    Script Date: 22/08/2018 11:51:06 a. m. ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[uspBusquedaCliente]
@Tablas VARCHAR(MAX),
@cFiltros VARCHAR(MAX)
AS

DECLARE @tblTablas TABLE
(
       cNombreTabla VARCHAR(200),
       bChecked BIT 
)


DECLARE @tblFiltros TABLE
(
       cFiltro VARCHAR(200),
       bChecked BIT 
)

INSERT INTO @tblTablas
SELECT Item, 0 FROM  [dbo].[udf_SplitString] (@Tablas, ',')

INSERT INTO @tblFiltros
SELECT Item, 0 FROM dbo.udf_SplitString (@cFiltros, '|')
DECLARE @SQL NVARCHAR(MAX) = '', @cTabla VARCHAR(MAX), @Where VARCHAR(MAX) = ' 1 = 1', @cFiltro VARCHAR(200)

WHILE EXISTS (SELECT TOP 1 1 FROM @tblFiltros WHERE bChecked = 0)
BEGIN
       SELECT TOP 1 @cFiltro = cFiltro FROM @tblFiltros WHERE bChecked = 0

       SET @Where = @Where + ' AND ' + @cFiltro

       UPDATE @tblFiltros
       SET bChecked = 1
       WHERE cFiltro = @cFiltro

END

WHILE EXISTS (SELECT TOP 1 1 FROM @tblTablas WHERE bChecked = 0)
BEGIN
       SELECT TOP 1 @cTabla = cNombreTabla FROM @tblTablas WHERE bChecked = 0

       IF LEN(@SQL) > 0
       BEGIN
             SET @SQL = @SQL + '
                    UNION 
                    '
       END

       SET @SQL = @SQL + 'SELECT m.cNombre as Municipio, l.cNombre as Localidad,d.cNombre as [Nombre del propietario],d.dSuperficie as Superficie,d.cRegion as Región,d.cManzana as Manzana,d.cSuperManzana as [Super Manzana], cLote,d.cClaveCatastral as [Clave Catastral],d.cEtiqueta as [Etiqueta del Expediente]
                           FROM tblDocumentos d
                           INNER JOIN ' + @cTabla + ' t1
                                 ON d.iIdDocumento = t1.iIdDocumento 
                           INNER JOIN tblCatLocalidades l
                                 ON d.iIdLocalidad = l.iIdLocalidad
                           INNER JOIN tblCatMunicipios m
                                 On l.iIdMunicipio = m.iIdMunicipio
                           WHERE ' + ISNULL(@Where, '')
       UPDATE @tblTablas
       SET bChecked = 1
       WHERE cNombreTabla = @cTabla

END

EXEC sp_executesql @SQL 

STORE

USE [GESTORIGECE] GO / ****** Object: StoredProcedure [dbo]. [UsbBusquedaCliente] Script Date: 08/22/2018 11:51:06 a. m. ****** / SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [dbo]. [UscClick Search] @Tablas VARCHAR (MAX), @cFilters VARCHAR (MAX) AS

DECLARE @tblTablas TABLE (        cName VARCHAR (200),        bChecked BIT )

DECLARE @tblFilters TABLE (        c VARCHAR filter (200),        bChecked BIT )

INSERT INTO @tblTablas SELECT Item, 0 FROM [dbo]. [Udf_SplitString] (@Tablas, ',')

INSERT INTO @tblFiltros SELECT Item, 0 FROM dbo.udf_SplitString (@cFilters, '|') DECLARE @SQL NVARCHAR (MAX) = '', @cTabla VARCHAR (MAX), @Where VARCHAR (MAX) = '1 = 1', @cFilter VARCHAR (200)

WHILE EXISTS (SELECT TOP 1 1 FROM @tblFilters WHERE bChecked = 0) BEGIN        SELECT TOP 1 @cFilter = cFilter FROM @tblFilters WHERE bChecked = 0

   SET @Where = @Where + ' AND ' + @cFiltro

   UPDATE @tblFiltros
   SET bChecked = 1
   WHERE cFiltro = @cFiltro

END

WHILE EXISTS (SELECT TOP 1 1 FROM @tblTablas WHERE bChecked = 0) BEGIN        SELECT TOP 1 @cTabla = cNameTable FROM @tblTablas WHERE bChecked = 0

   IF LEN(@SQL) > 0
   BEGIN
         SET @SQL = @SQL + '
                UNION 
                '
   END

   SET @SQL = @SQL + 'SELECT m.cNombre as Municipio, l.cNombre as Localidad,d.cNombre as [Nombre del propietario],d.dSuperficie as Superficie,d.cRegion as Región,d.cManzana as Manzana,d.cSuperManzana as [Super Manzana], cLote,d.cClaveCatastral as [Clave Catastral],d.cEtiqueta as [Etiqueta del Expediente]
                       FROM tblDocumentos d
                       INNER JOIN ' + @cTabla + ' t1
                             ON d.iIdDocumento = t1.iIdDocumento 
                       INNER JOIN tblCatLocalidades l
                             ON d.iIdLocalidad = l.iIdLocalidad
                       INNER JOIN tblCatMunicipios m
                             On l.iIdMunicipio = m.iIdMunicipio
                       WHERE ' + ISNULL(@Where, '')
   UPDATE @tblTablas
   SET bChecked = 1
   WHERE cNombreTabla = @cTabla

END

EXEC sp_executesql @SQL