hi,

I have a block that i need to mate to a flat bar that i have made on solidworks, they both have two holes with the exact same diameter the same distance apart that i created using extruded cut tool and i thought i could mate the pieces with two conccentric mates on each of the holes, but it is saying that i can't and that the hole centres are X mm apart, but X changes depending on where i drag the pieces. I have tried to use hole alignment tool but it is not working. i really need help because im trying to model my uni assignment. i can attach part files if needed.

Thanks