CAD Export - Overlapping Lines

[Batman]

I can't for the life of me find this option (as described below from the Revit help) anywhere in the CAD export dialog. Anyone know whats going on with it? Its driving me nuts :?:

Select Merge overlapping and collinear lines when exporting a 2D view to a DWG file. If this option is selected, several actions occur to lines in the exported drawing:

If there are two overlapping lines in the drawing, the thicker of the lines is kept. The thinner line is either shortened or removed.
If a thick line is completely inside a thin line, no action occurs.
If two collinear lines with the same visual parameters overlap, they are merged into one.
When walls become lines in the DWG file, no short collinear lines are produced.

[sbrown]

There is an options button on the right side of the export dialog box, when you click this there are 2 check boxes at the bottom, one says merge co-linear lines...

[Batman]

Scott, thanks for the quick reply. Does your version have these options; mine certainly doesn't (version 9.1 build 20060810_2300) ....

[Joef]

I'm not sure if it was moved or what, but it isn't in my Revit 9.1 either.

Joe

[robert.manna]

Dumb question and no 9.1 at home to test with, will do so in the AM, but has anyone exported a file to see if it just does this automatically now? I can't really think of too many situations where when exporting a CAD file you don't want co-linear lines merged....

Maybe I'm just getting punchy, and I need to go to bed.....

-R

[Batman]

Yes, it does do it automatically (removes overlapping lines). However I don't want that to occur, for example;

I have a wall with equipment placed against it. Freeze the equipment in AutoCAD and then its evident where the equipment was placed...gaps in the linework all along the wall.

Goodnight Rob.

[Steve_Stafford]

I was asked this very question yesterday and was surprised to find the Merge collinear Lines option missing as well. Apparently it is either automatic behavior now or something has been accidently turned off in the dialog.

I tested for the result you describe but didn't find the wall layer removed. Which components specifically did you use and are the categories specified for different layers in your export rules file?

If you've done well...and it still is doing this then it sounds like a bug to me. Best get support in the loop!

[Batman]

It's happening to me with objects such as Furniture and Specialty Equipment.

It occurs when the wall is lower than the object (in respect of cut plane).Example; A filing cabinet against a wall, wall mounted equipment set so that it's higher than the cut plane...you get the picture.

This rule is apparent with all things; a filing cabinet placed beside a desk - the edge of the desk is deleted and the filing cabinet will dominate.

Obviously this is a problem because if you want control of these items in a cad file and want to display just a particular object across a drawing there would be gaps all over the place where the adjacent objects are not visible.

They are on separate layers.

Thanks Steve, I will follow up with support.

[Steve_Stafford]

Originally this function was confined to walls and the resulting exported lines. Apparently scope creep has extended it too far. Thanks for taking it to support.

[Joef]

Originally this function was confined to walls and the resulting exported lines. Apparently scope creep has extended it too far. Thanks for taking it to support.And who exactly are you calling a "scope creep"?:)

[BWG]

They took this away from the feature set. I was chatised a bit when I mentioned why the functionality was taken away, but now it looks like someone actually needs it or desires it. :-)