# Cannot export the active 3D view in Revit to Unreal using Datasmith?

**URL:** <https://forums.unrealengine.com/t/cannot-export-the-active-3d-view-in-revit-to-unreal-using-datasmith/439674>\
**Category:** Architectural and Design Visualization\
**Tags:** export, Datasmith, Revit, unreal-engine, architecture, UE4, question\
**Created:** [December 17, 2018, 9:11pm UTC](https://forums.unrealengine.com/t/cannot-export-the-active-3d-view-in-revit-to-unreal-using-datasmith/439674 "2018-12-17T21:11:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![anonymous\_user\_6ae57095](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6ae57095](https://forums.unrealengine.com/u/anonymous_user_6ae57095)\
**Post date:** [December 17, 2018, 9:11pm UTC](https://forums.unrealengine.com/t/cannot-export-the-active-3d-view-in-revit-to-unreal-using-datasmith/439674/1 "2018-12-17T21:11:29Z")

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Hello, I receive the following error while attempting to use the Datasmith Add-in and export to Unreal.

I haven’t had this issue with any other Revit models. Has anyone else run into this issue? I’m hoping to resolve this as I continue to compare my settings to previous Revit projects.

I’ve attached my 3D View Settings from Revit. From what I can tell everything is the same as the last working project.

![262648-datasmitherrorshot-01.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/6/a/d/6ad45eca6dfee2b3ab4a009a477535ca8147c073.png)

![262649-datasmitherrorshot-02.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/5/4/1/5414dcb0ea70e466e80905f921b6ff83053b7c91.png)

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**Author:** ![Stephen\_Ellis](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/stephen_ellis/32/1210665_2.png) [@Stephen\_Ellis](https://forums.unrealengine.com/u/Stephen_Ellis)\
**Post date:** [December 17, 2018, 9:24pm UTC](https://forums.unrealengine.com/t/cannot-export-the-active-3d-view-in-revit-to-unreal-using-datasmith/439674/2 "2018-12-17T21:24:10Z")

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Hi April.

This is a known issue visible here: [Unreal Engine Issues and Bug Tracker (UE-66985)](https://issues.unrealengine.com/issue/UE-66985) and that should be fixed in one of our recent Datasmith hotfixes.

Please make sure to update to the latest Datasmith version for the UE 4.21 release. This includes updating **both** the Datasmith importer plugin in UE4 (via the Epic Games launcher), and the Datasmith exporter plugin in Revit (available here: [Datasmith - Unreal Engine](https://www.unrealengine.com/en-US/studio/downloads))

I hope this helps.

For all future Unreal Studio/Datasmith issues or questions, please be sure to log your issue to our dedicated Unreal Studio support site - [https://unrealstudiohelp.epicgames.com/s/case-community-page](https://unrealstudiohelp.epicgames.com/s/case-community-page)

Thank you.

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**Author:** ![anonymous\_user\_6ae57095](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_6ae57095](https://forums.unrealengine.com/u/anonymous_user_6ae57095)\
**Post date:** [December 17, 2018, 9:34pm UTC](https://forums.unrealengine.com/t/cannot-export-the-active-3d-view-in-revit-to-unreal-using-datasmith/439674/3 "2018-12-17T21:34:53Z")

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I had the error a week ago. I had no idea a new release came out and fixed the issue. Thank you!

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**Author:** ![DHP\_GNSL1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DHP\_GNSL1](https://forums.unrealengine.com/u/DHP_GNSL1)\
**Post date:** [June 24, 2024, 2:44pm UTC](https://forums.unrealengine.com/t/cannot-export-the-active-3d-view-in-revit-to-unreal-using-datasmith/439674/4 "2024-06-24T14:44:16Z")

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This is not fixed. Using Revit 2023 and neither Export file or Sync with Datasmith works. Getting the same error.

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/0/e/80e46f78cf5529368cab82890b35bf9a0c839a5f.png)

Cannot export the 3D view: An item with the same key has already been added. at Autodesk.Revit.DB.CustomExporter.Export(View view) at DatasmithRevitExporter.DatasmithSyncRevitCommand.ExecuteFunc(ExternalCommandData InCommandData, String& OutCommandMessage, ElementSet OutElements)