Layout Error Creating File

Sketchup model is not showing in Layout?

This is a pretty easy one; you need to save your SketchUp model after creating scenes. We do it just before I send the 3d SketchUp file to Layout, this way, I will have all of the updates in my 2D Documentation.

If you are using PlusArchitect or PlusDesignBuild, it has tools that automate this…

FYI, PlusSpec Pro does not come with the  2D construction doc export tool (layout tool), which will create standard paper-sized templates with multiple pages and add multiple scale viewports to each page (EG elevations and sections). It will auto-dimension and enable you to create drawings in Landscape and portrait views.
It is hard to answer your question exactly as I don’t know which version you are using. However, if you are using PlusSpec Pro, you need to do the following to create a 2d construction documentation set from a Sketchup model

1. Draw a Sketchup model (preferably with the PlusSpec tools as it will be easier and more organised)    
2. Create scenes using the Scene tool 
3. Save the Sketchup model
4. Go to file>Send model to Layout
5. Open the layout file
6. Choose the paper size
7. Position your viewport using the move tool
8. Right-click Set Scale
9. Right-click Set Scene
10. copy viewport paste and move
11. Right-click the viewport and choose the desired scene EG Elev 1

You will save a lot of time using PlusArchitect or PlusDesignBuild if 2D drawing is your main deliverable. Here is a tutorial

Below are the links to the two PlusSpec versions that automate Sketchup to Layout 2D construction documentation creation.
PlusArchitect
PlusDesignBuild