Here is the file path: Q:\Graphics\Plate_Layouts\Plate Actions\PlatesExcel_V3.7.xlsm
And what code are you actually using? What system? What is the actual physical layout of the drives? What version of Excel? It seems that you have a few misunderstandings here about a) how Windows handles this stuff and how b) it may require extra provisions in your code like converting the URI to a system path or vice versa. either way, without knowing the code and the other details nobody can tell you much about why this may not work.