Now I get this (you can only install elements catalog once.)
I don't know what this means, can you explain exactly what you did and where in the process this message appears? Also please quote the exact unedited word-for-word message.
When I start lightroom it shows the program screen that to says (click import ... to begin.
I then go to File _ import a elements catalog.
Next I get the response (you cannot import a photoshop elements catalog more than once.)
There is currently no catalog showing in lightroom.
What happens if you create a new Lightroom catalog, that will be empty. Can you import the PSE catalog then?
YESS !!! That appears to work.It is a large file so it will take time to load 30000pictures.