Content of section missing when exported to AutoCAD

[Anonymous]

I have a sheet which contains two sections in it. Both of them have contents displayed correctly. When exporting the sheet to AutoCAD, the contents in one of the section are missing. Not sure what happened. Can anyone give me some guide on what goes wrong. Thank you very much!

[syman2000]

Try setting the clipping to no clip. When you export it, it should display that section

[RDAOU]

@Anonymous 

That section on your sheet (the bottom one) doesn't make sense ... Why don't you simply use a plan view instead and adjust the cut plane to whichever level you desire?

[ToanDN]

I no longer have Revit 2016 so I opened it in Revit 2022 and the sheet exported just fine without changing anything.

[Anonymous]

Thank you very much. Which version of Revit are you using? I tried what you suggested on Revit 2016, the problem remains.

[Anonymous]

Thank you very much. Plan view might work for this case, but clip with line and the clip distance is decided from an Addin as a general approach. So I need to find a way to fix the original problem.

[syman2000]

I am using Revit 2017. If I export as is, it will show you exactly what you experience with 2016. When I check off clipping, it works fine.

[Anonymous]

Thank you very much. So it might be a bug of old version Revit? Tried it on Revit 2018. The problem remains, will try to find the oldest version that has this fixed.

[RDAOU · Accepted solution]

@Anonymous

This is a limitation which was there for certain imported non-native Revit objects (regardless in you import into a cuttable family or directly into the project) ...  I am not sure if they removed this limitation in 2022 or if they have simply changed DWG export to ignore Clip/No Clip parameter. 

To Export a Clipped SAT, True Form or any other non-native geometry, the view extents need to intersect least 1 of its edges.

• OR use a plan view instead of section where clipping is determined by the the view range
• Either the Left/Right extents of the section has to intersect the edge/bounding box of the element (image 1)
• OR the clip distance/depth need to enclose the element at both ends where it should be clipped (image 2)

Otherwise, upgrade to 2022 or export with No Clip as suggested by @syman2000 

Image 2A - original    Image 2B - View Depth adjusted

[Anonymous]

Thank you very much for the reply, and really sorry for the late response. Unfortunately it still did not work for quite some revit files when I tried your suggestions, for example No clipping does not work for the attached new rvt file.

There is one strange thing is that although there is no content shown when the exported dwg file is opened in autocad, however, what is shown in the preview is correct which suggest there is at least something in the dwg, but I do not know how to get the content out. 

[Anonymous · Accepted solution]

Inspired by your suggestion, the problem is solved by adding a tiny object of the corner of the view section so that the tiny object will intersect with the border of the view section. Then the exported dwg has the correct content display (with the tiny object). Thank you so very much!