https://communities.bentley.com/products/building/building_analysis___design/f/energy-simulation/228919/roof-modellingCurrently modelling a building where my ground floor has rooms at three different heights -&gt; staircase finishes at 12m (floor height) and a gym finishes at 7m and finally my offices/toilets/circulation which finishes at 3.6m. My first floor finishes 7en-USTelligent Community 12https://communities.bentley.com/thread/708268?ContentTypeID=1Mon, 25 Apr 2022 13:57:44 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:09c00e61-ca89-4827-b916-e330b2aaa2d2Amrit Bhambra<p>Thanks Shane, Updating the software now.</p><div style="clear:both;"></div>https://communities.bentley.com/thread/708257?ContentTypeID=1Mon, 25 Apr 2022 13:46:07 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:d8332a9e-4abf-455e-a715-fca6e537d3f9Shane Regan<p>Hi Amrit,</p> <p>I can see from your screenshots that you are not running on the latest version of the software.&nbsp;This will likely explain any modelling issues you may have been having with the software, as Update 9 is vastly improved from a stability point of view. It contains an entirely new interface to the roof modeller and resolved many issues such as the error message you show above.&nbsp;</p> <p>I would suggest updating as soon as you can.</p> <p>Please see further details in relation to the update at:</p> <p><a href="/products/building/building_analysis___design/f/energy-simulation/226025/openbuildings-update-9-now-available">OpenBuildings Update 9 now available - Energy Simulation Forum - OpenBuildings | AECOsim | Speedikon - Bentley Communities</a></p><div style="clear:both;"></div>