https://communities.bentley.com/products/road___site_design/f/geopak-inroads-mx-openroads-forum/208431/why-am-i-unable-to-see-the-rest-of-my-target-alias-surfaces-or-corridorsI have used the define target alias once so far for one of my ramps and it worked out. I am trying to replicate the process for another ramp but when I select the same tool it does not find the surface/corridor. I have my ramps in a separate model buten-USTelligent Community 12https://communities.bentley.com/thread/629466?ContentTypeID=1Fri, 15 Jan 2021 19:18:15 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:94e0cffe-3d12-418a-9723-1ca66e200552Yash Patel<p>I switched to my file that contains the ramp corridors and now I am able to see a varying number of surfaces on the ramps. I still do not completely understand what governs which surfaces will show up on a corridor when using this command but it will suffice for the time being. Thank you for the input.&nbsp;</p><div style="clear:both;"></div>https://communities.bentley.com/thread/629440?ContentTypeID=1Fri, 15 Jan 2021 16:16:53 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:d9b347fe-4d97-4588-bd22-9c2130f99042Joe Muni<p>I could be wrong, but you may need to add those corridors as &quot;Corridor References&quot; before they can be seen by the Target Aliasing tool.</p><div style="clear:both;"></div>