Hi! I am new to Zemax Optic Studio and am struggling to set up a system with a source, diffraction grating, and detector. I have been following this video as a guide: https://www.youtube.com/watch?v=NtjN7wr_Pl8&ab_channel=OzenEngineering%2CInc. 

I get the same results until close to the end of the video-- they change the wavelength and suddenly the diffraction pattern appears. As far as I can tell, I am using the same values in the non sequential component editor but cannot get the same results. I must be missing something, any help would be really appreciated! I’ve got the link for the .zar file I’m working with here: https://drive.google.com/file/d/11rnClZi5eTzIQc3PFDJTwQYhQvJ6gR08/view?usp=drive_link