I think you have things mixed up.
From
http://www.graphisoft.com/learning/training-materials/
you can download multiple training materials. Vol 2. refers to a file "Complete Model.pla". That is AC19 version.
From
https://myarchicad.com
you can download "ArchiCAD Training Series 18 International - Vol. 2", which package does contain a 01 Pavilion.pln" file.
Maybe you are trying to do the former, but reading the PDF of the latter?
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