The import macro for the Historical Chem template (Chem Column Format) nicely creates  and populates a Chemistry_Samples and Chemistry_Results Sheet.  I think it would be useful for the template macro also create a Lab_Reports import sheet  and populate with the Lab_Report_Number field that is in the Chem_Column Sheet (if present).  This will avoid a Parent Record Missing error and one can sequentially import the Lab-Reports then samples then results under one workbook rather than having to generate a separate Lab_Reports workbook.  This is also preferrable to creating parent records which can create troubles with improper location codes being created.