https://communities.bentley.com/products/geotech-analysis/f/forum/217137/3d-mesh-doesn-t-generateDear colleagues, I am facing a problem when generating a mesh for a simple steady state dam flux 3D analysis in Plaxis Groundwater. I am using Designer to generate a model volume and then importing it to Groundwater. The model is built with threeen-USTelligent Community 12https://communities.bentley.com/thread/662555?ContentTypeID=1Mon, 26 Jul 2021 12:56:20 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ff88a262-aa56-486f-9af4-c8e0250bdaa2Faseel Khan<p>It can be that&nbsp;there are&nbsp;areas where the thickness between surfaces is very small (less than 0.1 m). For a large 3D model we need to avoid&nbsp;zones that thin between surfaces.&nbsp;If this is the case you can run&nbsp;the <em>Apply Global Merge Distance</em> operation in Designer with a tolerance of 0.5 m on all of the surfaces at once and then paste them back into the Groundwater model. Then re-mesh and hopefully it should work.<br /><br />If the issue does not resolve and i<span>n order to be able to assist you with your project and identifying the reason for the problem you experience, please submit a service request.</span><span>&nbsp;</span></p> <p><span>Then, one of our support engineers can help you in detail:&nbsp;</span><a href="https://apps.bentley.com/srmanager/ProductSupport"><span>https://apps.bentley.com/srmanager/ProductSupport</span></a><span>&nbsp;</span></p><div style="clear:both;"></div>