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Cannot export the active 3D view - Revit 2020.2 / Datasmith plugin 4.24

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    Cannot export the active 3D view - Revit 2020.2 / Datasmith plugin 4.24

    I just downloaded and installed Unreal Datasmith plugin in for 4.24. into Revit 2020.2. With a model of 3 walls and a floor, I am getting the below error on export. What am I doing wrong?

    Object reference not set to an instance of an object.

    at Autodesk.Revit.DB.CustomExporter.Export(View view)
    at DatasmithRevitExporter.DatasmithRevitCommand.Execute(ExternalCommandData in_commandData, String& out_commandMessage, ElementSet out_elements)

    #2
    Can you wetranfer me the revit model? We are going to look at the crash here. Please send it to pierrefelix.breton@epicgames.com with your name and description.
    Pierre-Felix Breton

    Sr Technical Product Designer AEC, Unreal Engine
    Epic Games - LinkedIn

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      #3
      File emailed.

      Comment


        #4
        Same problem here, datasmith 4.24.1 and Revit 2020.2...have you got any luck to solve the issue?

        Cannot export the active 3D view:

        Object reference not set to an instance of an object.

        at Autodesk.Revit.DB.CustomExporter.Export(View view)
        at DatasmithRevitExporter.DatasmithRevitCommand.Execute(ExternalCommandData in_commandData, String& out_commandMessage, ElementSet out_elements)

        Attached Files
        Last edited by FrankiePibbs; 01-21-2020, 06:27 AM.

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          #5
          I noticed is something related to the phases, infact exporting models without them is currently working...
          I'm trying with a model with 90 phases (for 4d implementation) and it's having that problem mentioned before...

          Comment


            #6
            Sent model to Epic Staff and they are looking at it. My model was very small with only 3 walls and floor added to the arch template. I used a larger model of an interior and it worked fine. Revit Interior was set to Complete with no overrides.

            Comment


              #7
              Originally posted by FrankiePibbs View Post
              Same problem here, datasmith 4.24.1 and Revit 2020.2...have you got any luck to solve the issue?



              send me the file as well?

              Pierre-Felix Breton

              Sr Technical Product Designer AEC, Unreal Engine
              Epic Games - LinkedIn

              Comment


                #8
                So far we found 2 causes of exporter crash in 4.24.:

                1) Views containing project base point --> try turning this off in the views overrides, that might no longer crash?
                2) Exporting from the family editor --> for some reason, that use case never came across our mind. Insert the family in a model, then export to Datasmith

                Let us know what your findings are!
                Pierre-Felix Breton

                Sr Technical Product Designer AEC, Unreal Engine
                Epic Games - LinkedIn

                Comment


                  #9
                  I also have the same issue...
                  I can export the template models but once I load a project I get the error mentioned above.

                  Comment


                    #10
                    Originally posted by pf_breton View Post
                    So far we found 2 causes of exporter crash in 4.24.:

                    1) Views containing project base point --> try turning this off in the views overrides, that might no longer crash?
                    2) Exporting from the family editor --> for some reason, that use case never came across our mind. Insert the family in a model, then export to Datasmith

                    Let us know what your findings are!
                    Hi Pierre,
                    it did not solve my issue, however I'm sending you the model via Wetransfer, please have a look to it, it continues to generate this error, also turning off all overrides.
                    Thanks

                    Comment


                      #11
                      Thanks we’re looking into it
                      Pierre-Felix Breton

                      Sr Technical Product Designer AEC, Unreal Engine
                      Epic Games - LinkedIn

                      Comment


                        #12
                        Ok then, we wait for your idea back!

                        Comment


                          #13
                          Originally posted by Vyrwn View Post
                          I also have the same issue...
                          I can export the template models but once I load a project I get the error mentioned above.
                          send me an email at pierrefelix.breton@epicgames.com so we can have a look?
                          Pierre-Felix Breton

                          Sr Technical Product Designer AEC, Unreal Engine
                          Epic Games - LinkedIn

                          Comment


                            #14
                            I'm having this exact same problem! Need a fix urgently :/

                            Comment


                              #15
                              Hi all,

                              If this could help : I have the same problem and I cannot export from revit to datasmith with the same export error message.
                              The weird thing is that I can export an older file without problem (and only one...) but every other file has the same bug. I tried filters, removing phases, materials... and that doesn't help. I even tried to create a new file (revit 2020.2) from scratch with an official autodesk template and ... same error.

                              The file that works on export was created with revit 2020 (not 2020.2), so I tried to convert that file to a template for a new project with revit 2020.2 and got the same export error as the other files.

                              I tried to revert to revit 2020 without the 2020.2 patch, but every time I uninstall it, it installs the new one (2020.2) ...

                              Perhaps the 2020.2 update may cause this problem ?

                              Comment

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