Application source qualifier <application source qualifier name> tree is joined with non-detail source.
You connected or associated an imported tree and a record in an application source qualifier, and the record is not the detail record for the tree.
You can connect or associate an imported tree with a non-detail record if the non-detail record is related to the detail record and you connect or associate the detail record with the application source qualifier.
You can connect the tree and non-detail record to separate application source qualifiers and join them with a Joiner transformation.
To determine which record provides detail data for an imported tree, open the tree source definition in the Mapping Designer and click on the Attributes tab.