Mysql not recognizing Field Names on Stored Procedure - php

Question

I am trying to create a Stored Procedure where the user can select on the front end how to group the data pulled from mysql. But from some reason when I am trying to execute the query, MySql returns the error:
Query Error (exportEntries): Unknown column 'NumeroProducto' in 'field list'
I got this error by using some error handling code ($mysqli->error).
This is the code I am using to call the stored procedure in PHP:
$client = "CLT_6840";
$planta = $_GET['planta'];
$agrupacion = $_GET['agrupadoPor'];
$qry = "CALL exportEntradas('$cliente','$planta', $agrupacion)";
$stmt = $db->prepare($qry) or die('Prepare error (exportEntries): ' . $db->error);
$stmt->bind_param('sss',
$cliente,
$planta,
$agrupacion
);
$stmt->execute() or die('Execute error (entradas_generales): ' . $db->error);
And this is how my MySql Stored Procedure looks like:
CREATE DEFINER = `prolog`#`%` PROCEDURE `bd_demo_13`.`exportEntradas`( IN cliente VARCHAR(10), IN planta VARCHAR(10), IN C_AGRUPACION VARCHAR(20))
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
BEGIN
SELECT
eb.sCvePlanta AS Planta,
b.iConsecutivo AS IdBultoEntrada,
b.sCveEntradaBodega AS Entrada,
if(b.eTipoSeparacion <> "0", CONCAT(b.sCveEntradaBodega,"-", b.iConsecutivo), b.sCveEntradaBodega) AS NumeroEntrada,
DATE_FORMAT(eb.dFechaLlegadaMercancia, "%Y-%m-%d") AS FechaIngreso,
eb.sNumTalon AS NumeroGuia,
b.iConsecutivo AS idBulto,
b.iCantidadBultos AS CantidadBultos,
IF(eb.iCantidadBultosRecibidos = 1, ctb.sDescripcionSingular, ctb.sDescripcion) AS TipoBultos,
b.eTipoSeparacion AS TipoBulto,
cp.sNombreProveedor AS Proveedor,
eb.sComentariosGenerales AS Comentarios,
f.iFolio AS IdFactura,
f.sNumero AS NumeroFactura,
f.sNumeroPedido AS NumeroOrden,
pf.sCveClienteProveedorProducto AS NumeroProducto,
pf.iCantidadProducto AS CantidadProducto,
umc.sAbrUnidadMedida AS UMC,
cpp.sDescripcionProductoEspanol AS Descripcion,
"Entrada sin referencia" AS FechaCruce,
"Sin Caja" AS Caja,
b.sCveTrafico AS Referencia,
IF(b.sCveTrafico IS NOT NULL, CONCAT("En trámite. ", IF(mce.Comentario IS NULL, "", mce.Comentario)), mce.Comentario) AS ComentariosPropios,
#CASE WHEN b.sCveTrafico IS NOT NULL
# THEN CONCAT("Listo para cruzar. ",mce.Comentario)
# #THEN "Listo para cruzar"
# ELSE mce.Comentario
#END AS ComentariosPropios,
mce.SOT AS SOT,
mce.motivoSOT AS MotivoSOT,
mce.tiempoExtraFechaInicio AS teFechaInicio,
mce.tiempoExtraHoraInicio AS teHoraInicio,
mce.tiempoExtraFechaFin AS teFechaFin,
mce.tiempoExtraHoraFin AS teHoraFin,
mce.tiempoExtraMotivo AS teMotivo,
mce.tiempoExtraDiaFestivo AS teDiaFestivo,
mce.tiempoExtraImporte AS teImporte,
mr.pkIdRetrabajo AS Retrabajos
FROM cb_bulto b
LEFT JOIN cb_entrada_bodega eb ON b.sCveEntradaBodega = eb.sCveEntradaBodega
LEFT JOIN ct_bulto ctb ON eb.sCveBulto = ctb.sCveBulto
LEFT JOIN cu_cliente_proveedor cp ON eb.sCveProveedor = cp.sCveProveedor AND eb.sCveCliente = cp.sCveCliente
LEFT JOIN cb_relacion_remesa_banco_facturas rrbf ON b.iConsecutivo = rrbf.iConsecutivoBulto
LEFT JOIN cb_factura f ON rrbf.iFolio = f.iFolio
LEFT JOIN cb_producto_factura pf ON f.iFolio = pf.iFolio AND f.sCveCliente = pf.sCveCliente AND f.sCveProveedor = pf.sCveProveedor
LEFT JOIN ct_unidad_medida_comercializacion umc ON pf.sCveUMC = umc.sCveUMC
LEFT JOIN cu_cliente_proveedor_producto cpp ON pf.sCveClienteProveedorProducto = cpp.sCveClienteProveedorProducto AND pf.sCveCliente = cpp.sCveCliente AND pf.sCveProveedor = cpp.sCveProveedor
LEFT JOIN mahle.comentariosentradas mce ON eb.sCveEntradaBodega = mce.fkIdEntrada AND b.iConsecutivo = mce.fkIdBulto
LEFT JOIN cb_trafico t ON b.sCveTrafico = t.sCveTrafico
LEFT JOIN cb_detalle_orden_carga doc ON t.sCveTrafico = doc.sCveTrafico AND b.iConsecutivo = doc.iConsecutivoBulto
LEFT JOIN cb_orden_carga oc ON doc.iConsecutivoOrdenCarga = oc.iConsecutivo
LEFT JOIN cb_remesa_consolidada_factura rcf ON f.iFolio = rcf.iFolioFactura
LEFT JOIN mahle.retrabajos mr ON mr.fkIdEntrada = eb.sCveEntradaBodega AND mr.fkIdBulto = b.iConsecutivo
WHERE eb.sCveCliente = cliente
AND (b.sCveTrafico IS NULL OR (b.sCveTrafico IS NOT NULL AND oc.iConsecutivo IS NULL))
AND eb.dFechaLlegadaMercancia <= NOW()
AND eb.dFechaLlegadaMercancia >= "2017-01-01"
AND (
(eb.sCvePlanta = planta AND eb.sCveCliente = "CLT_6840") OR
((eb.sCvePlanta IS NULL OR eb.sCvePlanta IS NOT NULL) AND eb.sCveCliente <> "CLT_6840")
)
GROUP BY C_AGRUPACION;
END
The value contained in $_GET['agrupadoPor'] is NumeroProducto and I have also tried using the actual value of the field: pf.sCveClienteProveedorProducto
As you can see the field name actually do exist. Any idea why this may be happening .. and furthermore .. how I can correct it?