Subtract

[Bh_GuruCharan]

I can not subtract a cylinder from cylinder and the same problem raised when I am designing a bearing. I converted them to solid and subtracted only some random are getting subtracted and the other which are opposite to the subtracted one's are a converting solid and when I use separate solids it is not separating.  I have sent a video could you please assist me with this and mention me where I committed a mistake. First I thought this was a glitch so I uninstalled 2025 Auto CAD and installed 2024 Auto Cad the I understood that I was making committing a mistake. 

Please some one assist me 

[Kent1Cooper]

[It's not good to post the same topic multiple times.  If someone else is searching for the same thing, they may find one of your topics and not know that there is a solution on a different one.  And people might waste time working on a solution in one of them without knowing that what they have in mind has already been suggested elsewhere.]