uniteWith method in python script

[居安思危_Hu]

When using uniteWith method to union two objects in python script, the error was displayed in the command line.

"The Boolean operation on solid and/or surface bodies failed.

Modeling Operation Error:

Error Code number is 18026"

Did anyone else notice this situation?

[h_eger]

@居安思危_Hu ,

Which version of P3D?
Has the script ever worked?

[居安思危_Hu]

Plant 3D version 2024

It can work well if delete the marked codes. The below snip is what I need.

[matt.worland]

I see the same issue with your code in 2024 and 2025. I was able to get the cones to union and the base to union, but I could not get the base and the cones to union together. I would send to Autodesk Support to take a look.