Once the Dimension check runs, the result of the check will show up in a colored box to the left. You can expand the results by clicking the plus (+) button to the right, which will open a drop-down table with the results of the check.
If the Dimension check fails to run successfully after the CAD file has passed both the Structure and Georeference check, this is likely an issue with the validation check itself. In this case, the colored box on the left may show up yellow or red and a "Validation Failed" message will show up on top of the page.
In this case, contact the SPOC Helpdesk by creating a New Support Ticket and we will investigate.