Apply Enforced Displacment

Hi there,

I'm new at Hypermesh and I was wondering how to apply an enforced displacement as BC?

I've created a load collecter for my 'normal' constraints, and another one for my SPCD constraints, where I put dof3 on 25 for a displacement of 25mm. I've read, that I have to create another SPC with the same settings as the SPDC. But How do I merge the constraints for the SPC loadcase? And when I apply the SPCD constraints and the SPC constraints with the dof3 setting then following error appears:

  *** ERROR # 176 ***
  A dependent d.o.f. of rigid elements is constrained in an SPC set.

Can someone help me?