Custom Subassembly made with SAC 2021, only works in Civil 3d 2022 and newer!

[Yehoshua18]

Hi! 

I've recently made a moderately complex custom Subassembly with SAC 2021, and my packet does not work in civil3d 2021! It does indeed work in 2022!?

I got no clue why. 

Any Ideas?

Would be very very grateful for the help. 

Regards

- Yehoshua Shore