CAD-File with too much Text slows Revit project

[albano.haruni]

Hello,

this is my first question in this forum, I hope I get lucky.

We have a infrastructure project for which the Structural Part is done in Revit. We get some CAD-Files which we use as references for modelling. When we link a CAD our Revit project becomes very slow. Zooming in and out takes 4 Minutes. I starting breaking the CAD file down to the origin elements in AutoCAD and I believe that having a CAD with too many Text in it causes the problem.

If I take all TEXT from CAD away, there is absolutely no delay when zooming in and out.

In order to solve this problem, I have already tried many ways but nothing works. 

• In ACAD we use txt.shx which Revit should convert into Arial.
• Converting Text into Polylines can not be done automatically with txtexp or t2g.
• Splitting Geometry from Text and Import + Explode for Text would work but not being able to import by shared coordinates makes it impossible.
• Exporting the CAD file into IFC/NWC/DWF/SHP/Civil 3D Drawing is also not successful.
• Creating Blocks from Text in ACAD doesn't solve it.
• .... and a bunch of other workarounds which I can not remember right now

Attached is a simple CAD-File with more than 400 Text for anybody to test.

Can anybody help me?

[cbcarch]

-I doubt that the text is causing slow down in Revit.

-Try Purging the Cad file. Delete anything out of it that you don't need in Revit.

-Check where the Origin of the Cad file is--in relationship to Revit's internal origin, Project Base Point and/or Survey Point. If the Cad file's origin is more tan 20 miles away, Revit will have problems.

[albano.haruni]

I did purge but that doesn't help. Positioning of the CAD File is not causing the problem as well - I am not getting any warning. Loading it into a blank project with the option center to center is also slowing it down.  

Please feel free to try the attached CAD-File or create one with a lot of Text and try to navigate in it in revit.

[Anonymous]

Instead of keeping all the text as SHX, change them to a TTF so Revit doesn't have to convert.

But in the long run I suggest ditching this process and keep everything in Revit.

[albano.haruni]

That doesn't work

[Anonymous]

Are you inserting the CAD file into the project or Linking "By View" only?  Also, how many CAD files are you inserting into the project?  Revit isn't Autocad....while you can link in a few DWG's for references, it doesn't like a bunch of them as you are finding out.   

[albano.haruni]

Problem exists also with just one CAD

[barthbradley]

One file? Have you tried Auditing?

[albano.haruni]

No, what is Auditing? Yes, one file. Feel free to try yourself.

[Anonymous]

Another possible issue...your workstation is underpowered.  What are your specs?

[barthbradley]

Depends on where you Audit? In Revit, open file with "Audit" box checked. In AutoCAD, type "Audit".  

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@albano.haruni wrote:
No, what is Auditing? Yes, one file. Feel free to try yourself.

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Are you saying this is the problem-child in your Revit Project? "test, test, test, test, test...."?  Serious? 

[albano.haruni]

Everything Else Works Perfect. Which specification do you exactly have in mind?

Did any of you tried this out and can confirm or reject my issue??

[albano.haruni]

I have already done purge, see above

[barthbradley]

BTW: I had no issues with your example CAD in Revit.  Just a thought: are you sure it's inserting at the proper units in your Revit file?  

[Anonymous]

Computer specs....Processor, RAM, hard drive, video card, etc...

[albano.haruni]

I will Check that tomorrow. Thank you!

[dplumb_BWBR]

Open the file in CAD

Freeze the layers with text on them

Save

Link into Revit & pick "Visible" from the Layers/Levels drop-down

[albano.haruni]

That sounds interesting. I will try that tomorrow and let you know. Thank you!

[albano.haruni]

That makes my text invisible which is unsatisfying. 

[albano.haruni]

Yes, Meters in both ACAD and Revit. That is odd that you don't have this issue when you try...