Hello, i have a problem with a select, im trying to add a variable this is my sentence:

SELECT Ingeniero.nombre, SUM(Llamadas.tiempo_sol),;
AVG(Llamadas.tiempo_sol), SUM(Llamadas.calidad), AVG(Llamadas.calidad);
FROM helpdesk!llamadas INNER JOIN helpdesk!ingeniero ;
ON Llamadas.ingeniero = Ingeniero.codigo;
WHERE Sys(11,Llamadas.fllamada) >= sys(11,m.ini) AND ingeniero.codigo IN (chkvalue);
GROUP BY Ingeniero.nombre;
ORDER BY Ingeniero.nombre;
Into table ingestad.dbf

the variable is chkvalue and it displays an error when you run this query.

How do i solve this? its something wrong in my code?

Please help.