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Friday, March 12, 2010

Cannot Acquire Coordinates from a Model with Multiple Named Locations - The Revit Clinic

Source: http://revitclinic.typepad.com/my_weblog/2010/03/cannot-acquire-coordinates-from-a-model-with-multiple-named-locations.html

In your Revit project you have several locations defined in the project. Each of these locations can have a different project base point shared location, and each will be written to the CAD file as a named coordinate system when you export. In this example we will be using the Coordinate System Basis > Shared:

Say we have 4 Locations in our Revit project:

BuildingA – Project Base Point Shared Location N/S 0’-0”, E/W 0’-0”
BuildingB
- Project Base Point Shared Location N/S 100’-0”, E/W 100’-0”
BuildingC
- Project Base Point Shared Location N/S 200’-0”, E/W 200’-0”
BuildingD
- Project Base Point Shared Location N/S 300’-0”, E/W 300’-0”

Locations

Video Example

When exporting from Revit to CAD the 4 systems will be included. When opening the file in AutoCAD the default will be the location set current when exporting:

CADSystems
If you were to take this CAD file and link it into a new Revit project then Manage > Coordinates > Acquire Coordinates, you will receive a Cannot acquire coordinates from a model with multiple named locations error.

CannotAcquireCoordinates

Revit cannot detect which coordinate system to use since there are multiple saved systems.

To avoid this error open the CAD file in AutoCAD, and delete all of the saved coordinate systems except the system you wish to utilize when acquiring coordinates. Then you can link and acquire coordinates without the error message:

Video Example


Source:
Cannot Acquire Coordinates from a Model with Multiple Named Locations - The Revit Clinic

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