Specific problem with the maptrim command. Cant select automatically when I trim outside the boundary

[5umvap22_lindbj]

Hi everybody, 

So Im having problems with the maptrim command using CAD civil 3D. Everything work as expected if I trim inside the boundary using the select automatically option but when I select trim outside the boundary with select automatically it delets nothing. However when I select trim outside boundary and select the whole area by selecting manually it works as intended. It appears as I cant combine select automatically and to trim outside the boundary.  Anyone who knows how to solve this problem? I appreciate all the help I can get 🙂 

[AllenJessup]

What version of Civil 3D?

As a workaround you can try EXTRIM.

[ChicagoLooper]

Hi @5umvap22_lindbj 

You are running Civil3D and you are using MAPTRIM command from the Map3D toolset, correct?

First, draw your Boundary by drawing a 'closed polyline.'

<<It's a lot easier to define your boundary using a polyline that you draw beforehand.>>

If want to use the Select Automatically option to trim your objects, make sure your Trim Method is set to TRIM OUTSIDE BOUNDARY as shown above.

Here's a old post (dated 2017) from Jerry Bartels (Civil Immersion blog) regarding >>MAPTRIM<<.

[5umvap22_lindbj]

Im running the 2023 version. Thx but when using extrim doesnt delete everything outside the boundary for me. It only removes the lines that is touching the boundary. 

[5umvap22_lindbj]

Thank you for your response. 

That is correct. This is the selection Im making 

I select me drawn rectangle as boundary. The lines are polylines. It delets nothing outside the boundary. But everthing works when choosing trim inside boundary or when I manually select everything on screen. I really have no Idea how to fix it. Of course I could just manually select everything every time but I would like to find a way for the command to work and understand what has gone wrong. 

[5umvap22_lindbj]

I would like to add that Im sure the rectangle is closed aswell: 

[Udo_Huebner]

Object that cannot be trimmed

Check "delete" instead of "ignore".

[5umvap22_lindbj]

Still the same results. Thx for the suggestion. 

[AllenJessup]

It works as expected for me in 2024. Can you post your drawing with the boundary rectangle or a portion of the drawing?

Do you get this message after hitting OK in the Maptrim Dialog box?

[ChicagoLooper]

@5umvap22_lindbj 

From Autodesk….

Do NOT use select automatically. You should lock the layers hosting objects on your layout tab.  

You can read about it >>HERE<<.

[5umvap22_lindbj]

Sure I have added the dwg of just a random drawing with the same problem. Does not work for me. 
Yes I get that message. Thx for trying to help. 

[5umvap22_lindbj]

That could be a problem but the command does not work at all for me so it does not delete anything, nothing in layout gets deleted even if I dont lock layers used in the layout. 

[Udo_Huebner]

OK, multiple TRIM actions for the same object, this does not work as expected with MAPTRIM.
I would suggest to run MAPCLEAN first and break objects that cross the rectangle.