Beginning in OnBase Foundation EP1, the Legacy CAD and Engineering CAD Viewers are no longer supported and have been removed from the CAD Services module. If you are using the Legacy CAD or Engineering CAD Viewer and upgrading to OnBase Foundation 24.1, you will need to use the CAD Document Viewer in the Unity Client to fulfill your needs relating to markups. CAD documents can also be viewed as PDFs in the Web Client using the CAD Document file format.
To use the CAD Document Viewer, the Teigha framework must be installed. For more information, see the CAD Services module reference guide.