Is it possible that you don't have 'Check-Out' rights for the State that the component is in?
Confirm that u have check out right on the folder and state in the part exists.
Thanks for replying.
I do have checkout rights to the folder. Actually, I created the parts/assembly and checked them in EPDM. I then checked out back the assembly and now I am unable to check out the parts when I open them in a new window. The only way I am able to check out the components is to check in the assembly and select "Keep Checked Out" on the components