Multiple models in 1 variable

[eluser]Unknown[/eluser]
Yes, the variable

Code:

$fila_destino->nombre

always give me a valid model name, indeed when i used with the other models, works , the problem is just when i called the funcion 2 times and the second time the variable.

Code:

$fila_destino->nombre

give me. another string (a valid model name).
i tried with

Code:

$this->tabla_temp=null;

and

Code:

unset($this->tabla_temp);

but it didn't work. throw me an error