Import drawing files for models selected in creo

Hello, I'm trying to import a drawing file to the prt selected by creo using ProSelectionDrawingGet.

However, the error PRO_TK_E_NOT_FOUND appears and cannot proceed. Looking at the meaning, it means no associated drawing found, but I have a drw file in the model file.

I would appreciate it if you could let me know if I misunderstood this function or if it was used incorrectly.

Thank you.