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Alteryx Designer Knowledge Base

Definitive answers from Designer experts.

Error: There were more than 16 records in the source


Environment Details

  •  Alteryx Designer
    • All versions
  • Append Fields


The Append Fields tool creates a Cartesian Join (where every row from the Target input is joined to every row of the Source input) It is possible to unintentionally produce an excessive number of records, therefore it is recommended to keep the size of the Source input small. 


If the inclusion of more than 16 records in the Source input is intentional, select another option in the Warn/ Error on Too Many Records Being Generated dropdown. 

  • Warn on appends of more than 16 records creates a warning instead of an error (second image)
  • Allow All Appends