You Entered a download access code for a product upgrade but

you do not own a license to which this upgrade can be applied.

I have owned Cubase since ver 2. and have upgraded along the way. What does this mean?

Hi and welcome to the forum,

This means, you bought a wrong update/upgrade.

Which version do you own (you want to update/upgrade from)? Which version do you want to get? Which update/upgrade exactly did you buy?

I figured it out… Had to register online first… Then all went perfectly.