Display full version of the post: need help with line snap

bighorn
23.04.2014, 19:54
Please appreciate I am a beginner to AutoCad.When drawing,  reducing the length of a line back to
intersect with another line, typical I click on the line to be reduced, move my
cursor back to the line I want to shorten or extend it to, and a little green x
appears when I pass over the intersecting line, I click and the line shortens
to the intersection point.

For some reason, out of the blue, I cannot do this on a
drawing, a drawing I have been working on for days.  When I pass over the
intersecting line, no green x appears, it’s as if the line wasn’t there. Now to
confuse things further - it only occurs on some lines in the drawing, not all
lines. To get around this - I have to use the “trim” option to reduce the
length of a line - but that’s a pain.

Any idea on what’s happened?  Have I hit a button or
feature accidentally?  I have rebooted the file, repaired the file,
neither fixed. This happened once before a few months ago as well on a
different file, I just lived with it then. I’m using AutopCAD 2012 Lite.Anyone know what may have happened.

John Connor
24.04.2014, 13:52
Isn't that green "X" the Intersection osnap?What is the Z value of the two lines?
John Connor2014-04-24 13:53:48

bighorn
24.04.2014, 15:55
Yes and the z values of all lines are zero.Again this only happens with some lines in the drawing, I checked the properties of these lines that appear to be phantom lines and they are the same as the line I am drawing. These lines are also all in the same layer, base layer 0. 

John Connor
24.04.2014, 16:11
WBlock everything out and insert in a new drawing.  That should fix it.