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Cannot offset this Object???


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Posted

Hey,

I have serched the Forums and couldnt find an answer to my problem. Actually kind of surprising, so if i missed it, please point me to the right thread.

 

Anyway here it goes.

I have a closed polyline. Basiclly its a rectangle with some Radi instead of corners. The Elevation is 0.

When i try to offest this polyline it says:

Cannot offset this Object :x

Dont know what i am doing wrong. What did i miss?:(

Any advise is appreciated.

Posted

If you're offsetting it to the inside, your offset distance may be greater than half the width or length of the polyline, so basically you'd be asking AutoCAD to create a rectangle with a set of negative dimensions.

 

***Assumes bad Scotty voice: Ah simpla canae doot Cap'n. It defies the lawsa physics!***

Posted

nope, thats not it.

The "rectangle" is roughly 206'x380' and i only want to offset it 1' to the inside. Any other ideas?

Posted

If it's not a block, select the rectangle in question, and use the WBLOCK command to write it to a separate file and post it here.

Posted

What size is the radius in the corner?

 

If this is less than the offset distance, it wont offset.

Posted

I have come across polylines that refuse to offset. Usually with quite a few nodes, but I haven't quantified that. Offsetting is a mathematically intense operation, and if there are too many nodes (or something else), Autocad refuses to offset. :cry:

 

Could you post the offending polyline in a drawing, and let other folk have a go?

Posted

I normally find that z coordinates are always involved when I get the CANNOT OFFSET messagebox.

Posted

I ended up redrawing the polyline and the offset worked ???. I will review the Threat when ill come across an other one since it happens to me quite often it seems.

Posted

Thank you all for taking the time trying to figure out my problem :)

  • 8 months later...
Posted

I had the same problem - a large amoeba shape with a small offset. To solve the error, I broke into the shape, cut off only the portion that I needed an offset for, and closed that shape temporarily. The offset worked as expected for the smaller more manageable shape.

 

A lot of trouble to work around, but it worked. Maybe there was an "overlap" negative problem in some portion of the amoeba that I cut off, or there were too many nodes. Either way, I took care of it.

Posted

Afterthought: You don't even have to close the shape--just break it in two places, offset the portion you need to offset (or both halves if you need the whole thing offsetted, then close your original shape back up.

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