Merging Vertices?

[BamBamm]

I have a cube...
I have a cylinder with sub divisions set to 8 (Octagon)... I cut it in half
Now I want to connect the cube with the octagon...

Merging vertices doesn't do anything...

http://i1055.photobucket.com/albums/s501/willabam/Octa-Cube1_zpsksahrxcy.jpg

http://i1055.photobucket.com/albums/s501/willabam/Octa-Cube2_zpsp61somtm.jpg

http://i1055.photobucket.com/albums/s501/willabam/Octa-Cube3_zpsgh40ocgv.jpg

[stwert]

You'll need to combine the geometry first so they are one object. Select both objects and do a Mesh > Merge command. Then you will be able to use the Merge command on components.