'''Notes:'''* Is very important to set the right type for each column. When the type isn't is not right normally , the word NULL will be show shown in the cells.

* When you add new columns in the imported file the header color will be red.* You can´t delete existing columns in data sourcethe datasource.* In value columns , empty cells (NULL) will be converted to "0".* In date columns , empty cells or not valid dates will be converted to NULL.* In text columns , empty cells will be converted to NULL.