Se ha generado una excepción no controlada durante la ejecución de la solicitud Web actual. La información sobre el origen y la ubicación de la excepción pueden identificarse utilizando la excepción del seguimiento de la pila siguiente.
<pre>[ArgumentException: El diccionario de parámetros contiene una entrada NULL para el parámetro 'idunidad' del tipo que no acepta valores NULL 'System.Int32' del método 'System.Web.Mvc.JsonResult ListarIntegrantesUnidad(Int32)' en 'CapaPresentacion.Controllers.MantenedorController'. Un parámetro opc
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