That's ok but I still have an error.
I try doing it localy and it works perfectly.
When I create the object in the mts it doesn't work!!
The best behavior I get is with the function; at least it doesn't rise me an error: I can do well the loop but I still can't asociate it to the datacombo

I get this error in the line Set DCmotivo.RowSource = RsGrilla (I'll try to translate it to English):
error in the method RowSource of the object Datacombo
thank you