Rows match no scenario table

Some rows reaching Create Scenario match no scenario table, because no Map node prepared them, or a table arrived under a name that cannot be stored. This is a warning: those rows are not saved, and the rest of the scenario is.

What to do

Put the right Map node between those rows and Create Scenario. A table's name has to be short and made of letters, digits, underscores or hyphens.

Where it comes from

Shown by Create Scenario. It is one of the messages about the scenario.