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FDN - Find Double Nodes add-in for Autodesk® Revit® enables structural engineers to find nodes that are close to each other but not connected in the analytical model of a building. FDN shows unconnected nodes found within the given margin and users may isolate then zoom into the selected nodal area.


Once you download and install FDN, it comes with the limited functionality mode. Limited functionality only enables you to find and list double nodes. Zoom and other functionalities won't work in this mode. In order to use full functionality you can get Free Trial License (3 days) by clicking Help -> License -> Try. This will take you to our licensing site, where you can download the trial license with your request code. 


An email containing the license file will also be sent to you after you fill out the simple form. Once you get the XML file, you can now activate it by clicking Help -> License -> Activate and work with full functionality. 


To obtain a Standard License(1 year) with different payment options please contact us from support email.



  • List of unconnected nodes
  • Select and visually indicate double nodes 
  • Isolate selected nodes and connected elements
  • Zoom-in to the problematic area
  • Set the Margin of connectivity 
  • Show/Hide Nodes in the Analytical Model
  • Switch Thin Lines
  • Import/Export Node List
  • Modeless WPF window
  • Adjust Zoom Speed
  • Adjust Pan Speed
  • Copy the selected nodes list from the data grid   


It is vital to set up the Analytical Model properly in order to carry out the FE analysis correctly. While building the structural model, precision issues or inaccurate analytical modeling may introduce some errors such as analytical nodes not connected to each other. 


Analytical elements that have nodes that are too close in geometry but in fact not connected will cause problems in many steps of structural analysis. Such as the occurrence of finite elements which are very small, auto meshing process not converging resulting in incoherent mesh, incorrect stiffness matrix, wrong results and many more... 


Finding the unconnected nodes manually becomes a huge deal for a structural engineer. Analysis software (Robot Structural Analysis, Sap2000, Etabs, Staad Pro, etc.) may provide tools to remedy this but consume considerable time and effort. It is better to find the problem with the main Autodesk® Revit® model before sending it to analysis.  


FDN will remove the hassle of manually checking the connectivity of each node, and save your time. By listing the unconnected nodes, you can now correct those nodes before sending your model to analysis. Especially in larger models where it is hard to see the connectivity, FDN will save your time and show those nodes flawlessly.  


To check the connectivity easily, the user can select the node from the list and zoom into the area by clicking zoom and see (the structural elements that are relevant) with an isolated view. By isolating it gets easier to analytically adjust and correct the error. Furthermore, the modeless GUI window provides a smooth workflow. You can interact with Revit while you are using FDN. This is a huge plus as you do not need to close and reopen the application and work along with your model.

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Informace o této verzi

Verze 1.0.7273, 03.12.2019
Minor bug fixes Speed Improvements

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  • Very useful app
    Mostafa Elashmawy | srpna 03, 2016 Ověřené stažení (Co je to?)

    this app is a helpfull apps in case you have a large model with small discrepancies that you can't find alone the app find it for you, isolate it and help you adjust it.

  • Handy Application
    Konstantinos Vazouras | července 21, 2016 Ověřené stažení (Co je to?)

    This Add-in on Revit is a handy application, especially when a revit model with some minor imperfections has come to the office! Saves time and efforts! There are some more features that could be included in the future, but so far it's still a very useful tool.

  • Great app
    Paul Edwards | června 17, 2016 Ověřené stažení (Co je to?)

    This app is really useful, it found detached nodes in my big model. Saved my time, brilliant!

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