# Unable to Union two solids categorized structural framing

**URL:** <https://forum.dynamobim.com/t/unable-to-union-two-solids-categorized-structural-framing/44588>\
**Category:** Revit\
**Created:** [December 17, 2019, 12:53pm UTC](https://forum.dynamobim.com/t/unable-to-union-two-solids-categorized-structural-framing/44588 "2019-12-17T12:53:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Pedersen](https://avatars.discourse-cdn.com/v4/letter/p/8e7dd6/32.png) [@Pedersen](https://forum.dynamobim.com/u/Pedersen)\
**Post date:** [December 17, 2019, 12:53pm UTC](https://forum.dynamobim.com/t/unable-to-union-two-solids-categorized-structural-framing/44588/1 "2019-12-17T12:53:48Z")

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I’m testing out an Autodesk University course for parametric design of a crane script. And now i’m running into problems with the elements modelled in Revit

 ![Dynamo Crane Script](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/0/2/0267d6747fba0f4e9ad022a5d12895596c549c9b.png)

Its specificallyt the Structural Framing which generated an error on Solid.ByUnion  
Seems like i have some elements which causes this error, and generates null values, but i cant seem to find out how to fix it.

 ![2019-12-17_1348](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/0/7/07fadcec9f19f019f34958f50db4aafedd840e62.png)  
.  
Is there a way to fix it either in Dynamo, or find out which elements causes the problem and fix these in Revit if needed.  
Im using:  
Revit 2019  
Dynamo 2.x

And the following packages:  
BIM4Struc  
Optimo  
Clockwork

Files:  
[LiftRangeCapacity2.xlsx](https://forum.dynamobim.com/uploads/short-url/muHigLMB3sfBLNqZ9nXgvwvxGAS.xlsx) (10.4 KB)  
[Parametric Crane Optimization.dyn](https://forum.dynamobim.com/uploads/short-url/8iqlY7AtO12EVVRe5gN85iQPoY8.dyn) (205.4 KB)  
Revit model: [https://we.tl/t-EC8hiJpx1h](https://we.tl/t-EC8hiJpx1h)

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**Author:** ![jaaamie](https://avatars.discourse-cdn.com/v4/letter/j/8e7dd6/32.png) [@jaaamie](https://forum.dynamobim.com/u/jaaamie)\
**Post date:** [January 5, 2020, 11:32pm UTC](https://forum.dynamobim.com/t/unable-to-union-two-solids-categorized-structural-framing/44588/2 "2020-01-05T23:32:23Z")

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Hey Pedersen,

Is the problem solved? Seems that the revit file is not available through that link.

Regards,  
Jamie

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<div class="post-metadata">

**Author:** ![Pedersen](https://avatars.discourse-cdn.com/v4/letter/p/8e7dd6/32.png) [@Pedersen](https://forum.dynamobim.com/u/Pedersen)\
**Post date:** [January 9, 2020, 7:39am UTC](https://forum.dynamobim.com/t/unable-to-union-two-solids-categorized-structural-framing/44588/3 "2020-01-09T07:39:54Z")

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Hello Jaaamie.

No i did not solve my problem yet.  
I can load up a new link for the Revit model: [https://we.tl/t-v2EK3PaXTW](https://we.tl/t-v2EK3PaXTW)