Learning Forum

[Praneeth]

Hi Changming Song,

Thank you for reaching out to the Ansys learning forum. 

Please let us know the version of AEDT that you are using to help us serve you better.

Regarding your first question about getting unclassified objects, please make sure that you are using the thicken sheet command correctly (assuming that you received unclassified objects during the thicken sheet command). 

Regarding your main question,it looks like you have some other objects created during the geometry creation (maybe by mistake). To check if the boolean subtract is working as intended, please hide the remaining objects that are not part of the boolean operation, perform the boolean operation and see the result. Also, it is recommended to verify that all these sheets are on the same plane by using the properties panel.

Hope this helps.

Best regards,
Praneeth.