Figure 1 shows an example in which the upper limit number of repeating containers "breakdown" is set to "3".
When the third iteration container input field is displayed, you can not press the "Add" "Insert" button.
You set the details of the repeating container type item ("Breakdown" item in this example).
Describe the number in "Repeat - Maximum number of repetition items" in the "Input control" tab of the model item detail definition dialog.
If this value is blank or "-1", there is no upper limit, and will be.