To insert row or column models in your report, put your cursor in the corresponding place and choose:
or Edit
® Columns ® Get column modelWhen you insert the model, it overwrites all previously defined row and column definitions for that report section. For this reason, you should define additional report rows/columns only after you insert the model.
or Edit
® Columns ® Insert column modelThe model is added to the defined report as the last row or column. No other row or column is overwritten.

You can only use a characteristic in the report rows, columns or in the general selection criteria.
Ensure that when you define a row, the characteristics used for it are not already being used in a column or in the general selection.
Ensure that when you define a column, the characteristics used for it are not already being used in a row or in the general selection.