Topic: Can't select Entities with Non-zero elevation

[SomeCallMeDave]

I have a civil drawing (site plan with contours both existing and proposed) and Autocad will not allow me to select any of the object with a non-zero elevation (z-value). 

If I draw a line or polyline with a zero elevation, I can select it as usual for move, copy, list, etc.  But if I change the elevation, I can still see it, but can't select it.

Any else ever had this problem?  Anyone ever had it and been able to fix it? 

I have opened the file in BricsCad and can select all objects as selected, but when I save the drawing and re-open it in Autocad, I get the same, no-select, problems.


Thanks,
David

[CAB]

Don't know the answer but what version of ACAD are you using?

[SomeCallMeDave]

I have seen the problem in  2004 and 2007 vanilla and C3D2009 as autocad

[CAB]

I assume you have ruled out the obvious, unselectable groups & locked layers.
An audit or regen doesn't fix it?

Can you post a sample DWG?

[SomeCallMeDave]

I assume you have ruled out the obvious, unselectable groups & locked layers.
An audit or regen doesn't fix it?

Can you post a sample DWG?

Yep, all the obvious causes have been checked and ruled out.

I can, however, select the entities using SSX, but not with on-screen selection.

The problem file is attached

EDIT:  THe attached file is a portion of the original.  I used SSX to select some of the problem entities, dxf'ed them into a new file and still had the problem.  So I attached that new file since it is smaller.  The DXF process changed the lwpolylines to old style polylines, but the problem is still there.  Too weird

[CAB]

When I do a REGEN the contour line disappear. I suspect that they do not really exist.
Not an answer, but there is no object there. Just some leftover screen debris.

[Rob...]

They do disappear after a regen but reappear after zoom extents for me. I am able to select them with a select all (Ctrl+a) but cannot deselect them with a crossing window. In fact there are a number of text objects, blocks and arcs that cannot be deselected. If I copy and paste them into another file, I can select them.

[SomeCallMeDave]

Those are exactly the results that I get (regen - appear-disappear).

But they do exist.  I used SSX to select everything then used a LISP routine to change the elevations to 0 and the contours are selectable.

Strange results indeed

[CAB]

Issuing the DVIEW command seemed to reset the ploylines to selectable.
Don't ask me how.

[SomeCallMeDave]

Issuing the DVIEW command seemed to reset the ploylines to selectable.
Don't ask me how.

Worked for me too.   Thanks for finding that little trick.  Did you have some reason for trying DVIEW?

[CAB]

No reason, just thought the ucs may be the culprit & my ucs buttons have dview in them.
When the button worked I broke out each command.

^C^Cdview;;tw;-90;;_ucs;w;_ucs;z;90;

[Bryco]

I have read about the dview before but keep forgetting it.
Command: 3 3DORBITCTR Specify orbit center point:
** Orbit commands cannot be used at this scale **
This was an odd warning I got before using the dview and with a zoomextents on a frontview the drawing becomes a dot.