52819
The following diagnostic is generating:
Form 6252 #{PrefixNum}: Please enter the Property Code as detailed in the Form 6252 instructions.
Solution:
Click on the diagnostic in the Diagnostics tab or go to the Installment Sale asset in the Dispositions screen, scroll down to the appropriate Installment Sale section and in the 'Property Code' click the arrow down button and choose one of the choices available. This diagnostic will prevent e-file if ignored.