Polyline problem

I am trying to offset a line on a drawing but it wont work.

WHAT I have done is draw over a section of another line (the white line) and then tried to offset that but I see the new line only has one vertices at the start but why not at every change of direction?

any Ideas?

Drawing4.dwg

Very starnge, never seen this before. I tried to draw new line &it has same one visible vertex when selected. though when you list. it shows 4 diifernt vertex coordinates

LWPOLYLINE Layer: "0"

Space: Model space

Handle = 930

Open

Constant width 0.0000

area 1237504026.9816

length 148663.6399

at point X=342861001.0040 Y=388562004.5380 Z=3.5552E+99

at point X=342871999.9160 Y=388596004.8060 Z=3.5552E+99

at point X=342903001.3450 Y=388633004.2150 Z=3.5552E+99

at point X=342952999.3960 Y=388674002.4790 Z=3.5552E+99

would be intresting to know what's causing this?

It looks like the cause is the value of Z being very far away from 0 (zero)

It looks like the cause is the value of Z being very far away from 0 (zero)

And how do I fix that?

City are back whoo whoo...sorry

All the Z values of the endpoints of all the polylines in that drawing appear to be the same, so just select all your polylines, and reset the 'Position Z' back to 0 (zero) within the Properties Dialogue Box

All the Z values of the endpoints of all the polylines in that drawing appear to be the same, so just select all your polylines, and reset the 'Position Z' back to 0 (zero) within the Properties Dialogue Box

Nice one. Thanks for that.