Saving New 3D Object

[Mik001]

Hi,

I am trying to create a 3D object from a .dwg file that has contours in it at 1m height intervals. I can get it into imported into ArchiCAD no trouble. But when I try to save the 3D object I get an error message saying 'To save this object in version 28, you must choose a License on the Details page'.

Does anyone have any idea what this means and how to get through this? I have a full license for AC 28 so am quite confused why it is asking me for my license number...

Operating system used: Windows 11

[Mik001]

Here is what I have tried: I attached the relevant georeferenced xrefs so they all stack (align) with each other. At this point the drawings are thousands of kilometers away from the project origin. I activated the survey point which was dead on the project origin. I then moved the survey point to a known point on the project drawing (xref), turned on the survey point coordinates and noted down the new coordinates. I then moved the entire drawing and positioned it back beside the project origin. I moved the survey point back to the same known point on the drawing, then re-entered the same coordinates but this time as negative values. Now, in theory, the survey point is still at the same distance away from the drawing itself, only the drawing is now close to the origin so AC will play nicely. 

Does that sound correct?