Hi there.  I've just joined the forum.What can cause the 2D intersection osnap to fail? It simply doesn't recognise it.

Is it really a true intersection, not just an apparent intersection (overlapping lines in 3D)? Try the APPINT osnap.

Intersection is real as the x-axis has '0' value.  I work in 2D.  Is there a function allowing to 'flatten' any  'apparent  intersection' , just in case (bringing it all to one plane with z=0) ?

Three reason :
1. You don't have set osnap
2. After set osnap, must be turn ON
3. If 1, 2 OK, you must input command
 
Click right mouse into OSNAP tab - setting - select all - OK - turn ON.

If you use the li  (list) command do any of them have a z value?  You can, in 2005 set the z value to zero, by selecting the item in question and using the properties command...:)

Thanks.

Did it sort out your problem?

Not quite.  There seems to be some bug in the program, as the problem is not consistent and only occurs occasionally and with no apparent reason.  All the above suggested options has been considered and the problem persists.No big deal.  I can deal with it in my own way - just an annoying glitch.Thanks again for your concern and help.Daniel

maybe this is gonna help you:
if you have Autocad express tools installed, you can use the "flatten" command so that you can be sure it is in 2D.

hey there, hope this answer your inquiry:
First you have to checked your UCS;
>type UCS
>hit the enter or space bar
>type W (World)
>hit the enter of space bar

and now it is set for UCS World

Second you have to check your object(Line, etc.) whether the Z-axis is set to zero (o) or not
> by simply selecting an object or line etc (highlight it)
>press Ctrl + 1 : A properties will come out
same command line is : "MO" and hit enter its the same command will come out
Note: A pop-up window of PROPERTIES will come out.
> try to check in GEOMETRY
>"End Z" and "Delta Z" SHOULD BE ZERO
Note: By left click on the dialog box beside "End Z" or "Delta Z" type 0 to set all in one plane.

Note: Always check all Geometry Object or Lines, "Z SHOULD BE ZERO". so that all you want for osnap is present in 2d.

Hope this Help my Friend..

Many Thanks.  Very precise info, but nothing seems to work.  The problem remains.   I've checked everything.  Perhaps, If you feel like, drop me a line on < dbialy@optusnet.com.au > with your email address and I will send you a little sample of a few lines that intersect in 2D but you cannot osnap to them (I have to trim the line to osnap to the endpoint instead).Personally, I gave up on it.Daniel

Try flattening your drawing "FLATTEN" Command. Change the "Z" or Elevation Values on the properties.

Thank you guys.  The problem has been resolved.