Cannot host family to reference line correctly

[Kaitlyn.Kistler]

I made a light fixture - a screen on a bracket that hangs from the ceiling. I am trying to give the screen portion a tilt parameter. However, when I attempt to host my light fixture to the reference line associated with the tilt parameter, it would not be oriented correctly and I couldn't rotate it ("front" elevation was portrait when I needed landscape). It's a nested family. I tried to rotate the light fixture in its own family and load it back in, and now I can't select any reference line to host it to. Or I'll host it and then changing the tilt angle will throw up an error. Like the reference line and family will rotate independently even though it's hosted AND aligned and locked.

Also if I change the angle to 0 degrees and then back to something else, it loses association with the rotation center and screws up again.

It's driving me mad! Any advice appreciated! Attached model is in 2019. I reverted all changes back so the screen family is modeled in the correct orientation and the "tilt" family is not hosted to the parametric line.

[ToanDN · Accepted solution]

The Light Screen nested family was NOT hosted by the ref line.  See the revised family see if it works.

Revised:

[Kaitlyn.Kistler]

Hi thank you so much! it's close, but the screen itself is rotated 90 degrees in the wrong orientation. So the flat "frame" bits that are pointed up/down in the screenshot should be what is connected to the "headphone" parts of the bracket. Sorry, I'm not a lighting or AV engineer so I don't know what the actual terms are...this is where I was having a lot of trouble because I can't rotate it after it's hosted to anything, and if I rotate the components within the family, they no long host to the same line 🤔 

[ToanDN]

See the 2nd revised family in the edited post.

[Kaitlyn.Kistler]

 you are my hero ❤️