MESH DIFFERENCE not working

I tried using difference option, but it’s not working on all geometries within Grasshopper. Does anyone had the same problem? I am sending the file where you can see at the end when i do the difference it is only working partially.

Following photos show how it is supposed to look like (all the geometries should be subtracted), while the result only subtracts one.

Thank you

PATTERN 2.3dm (32.4 KB)
PATTERN 2.gh (12.4 KB)

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Are you using the command SolidUnion before you use Boolean Difference? I tried the same thing and it’s not working again.

Yes. Did you “flatten” the inputs? To do so you right-click on the B input and check the flatten option.

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