I can't stretch some plines..

[yrnomad]

I use a pline based lisp to show building electrical circuiting.

In one of the projects I am currently working on, I will draw the pline (with a few bends in it), and it seems fine. Then for some reason when I come back to it to stretch my existing pline, and use a crossing to select it, it moves instead of stretching. When I select it, it only has a grip at the origin, not at any of the other joints.

It is only this drawing, none of the other projects seem to be affected.

Any clues?

[eldon]

Have you tried listing the object? With only one grip, it sounds as if it could have turned into a block. You haven't copied it from another drawing, and inserted as a block

 

If it is a block, then an EXPLODE will put it back to a polyline

[yrnomad]

I just drew a four in a row. The first had one bend in it, (the routine fillets the corners), and when finished I picked it and only one grip showed up. I listed it, and the info seems similar to the ones that still have multiple grip points and are stretchable. I also exploded it, and once exploded each segment of the pline had on grip point...and moved by the grip point rather than stretched, even though it was executing a "stretch"

Of the other two I tried, both had multiple segments, and one was done with our routine and the other just used the pline command. So far the first is the only one to only have one grip.

The only thing I can see that determines whether it will have one grip point or two is if I use OSNAPS. I might pick a snapped starting point from the architects symbol in the xref, do a straight line off it, and it will only have one grip point. but if I don't use osnaps the line has multiple grips and stretchable.

[eldon]

I also exploded it, and once exploded each segment of the pline had on grip point...and moved by the grip point rather than stretched, even though it was executing a "stretch"

 

If you exploded it and it still remained as a polyline, then it must have been a block in the first place - very puzzling.

 

Could you please post a drawing that only contains one peculiar polyline and one ordinary polyline, and someone could have a further look to try and solve your mystery?

[yrnomad]

No, sorry for misleading you. When exploded it becomes separate line and arc segments. But even then each segment has one grip, not one at each end.

I think I've got it though. I've been looking at the devices the architect provided that I'm snapping to. They have a 1.0000E+99 Z coordinate. Neither flattening command I have seems to help them. I'm having to use quick select and move their elevation. After moving the outlets to a 0 elevation, the osnapped conduit runs seem to be fine with multiple grips and are stretchable.

I'll let you know if this doesn't fixt the drawing.

[eldon]

Well done for finding out what the problem was. I tried drawing a polyline from the endpoint of a line at elevation 1e99, and the polyline only had one grip. I then "Flattened" that polyline and it turned normal again. So flatten your polylines that you started by snapping to a point on the architect's drawing. Or use the .XY filter when you snap to the endpoint and give a z of zero.