Nobody can help me?
I'll bet nobody looked at this forum yesterday.
I took a look at your workbook.
At a quick glance it appears that your [Municipality] field in the primarty data source has lower- and upper-case letters in the data values, and in [Municipio] in your secondary source, it's all upper-case.
So simple!!!...that´s it!..I never thought that could be the problem!!!...Thank you very much Joe Oppelt and Merry Christmas!!!