topic Re: CAD-File with too much Text slows Revit project in Revit Architecture Forum

CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 15:26:55 GMT

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?

Re: CAD-File with too much Text slows Revit project

cbcarch — Thu, 20 Dec 2018 15:35:11 GMT

-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.

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 15:47:57 GMT

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.

Re: CAD-File with too much Text slows Revit project

Anonymous — Thu, 20 Dec 2018 16:55:13 GMT

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.

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 17:11:01 GMT

That doesn't work

Re: CAD-File with too much Text slows Revit project

Anonymous — Thu, 20 Dec 2018 17:27:49 GMT

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.

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 17:42:06 GMT

Problem exists also with just one CAD

Re: CAD-File with too much Text slows Revit project

barthbradley — Thu, 20 Dec 2018 19:20:45 GMT

One file? Have you tried Auditing?

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 19:26:25 GMT

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

Re: CAD-File with too much Text slows Revit project

Anonymous — Thu, 20 Dec 2018 19:36:16 GMT

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

Re: CAD-File with too much Text slows Revit project

barthbradley — Thu, 20 Dec 2018 19:46:17 GMT

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

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

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

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 19:59:25 GMT

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??

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 20:02:25 GMT

I have already done purge, see above

Re: CAD-File with too much Text slows Revit project

barthbradley — Thu, 20 Dec 2018 21:56:30 GMT

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?

Re: CAD-File with too much Text slows Revit project

Anonymous — Thu, 20 Dec 2018 22:24:24 GMT

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

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 22:29:25 GMT

I will Check that tomorrow. Thank you!

Re: CAD-File with too much Text slows Revit project

dplumb_BWBR — Thu, 20 Dec 2018 22:32:18 GMT

Open the file in CAD

Freeze the layers with text on them

Save

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

Re: CAD-File with too much Text slows Revit project

albano.haruni — Thu, 20 Dec 2018 22:35:25 GMT

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

Re: CAD-File with too much Text slows Revit project

albano.haruni — Fri, 21 Dec 2018 10:29:36 GMT

That makes my text invisible which is unsatisfying.

Re: CAD-File with too much Text slows Revit project

albano.haruni — Fri, 21 Dec 2018 10:43:04 GMT

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