Application Source Qualifier <Application Source Qualifier name> has a tree instance <created tree source definition name>, whose source name through a mapping variable cannot be expanded or resolved correctly.
You entered a mapping parameter or variable for the PeopleSoft tree name that does not exist in the mapping parameter file for the session.
Specify the correct mapping parameter file for the session. Verify that the parameter file contains a value for the mapping parameter or variable that you entered for the PeopleSoft tree name.
You entered an invalid value in the parameter file for the PeopleSoft tree name mapping parameter or variable.
Verify that the value you entered in the mapping parameter file for the PeopleSoft tree name mapping parameter or variable is in the correct datatype format.