Actually you don't even need the CNODE. Simply model the displacements (all six degrees of freedom specified) you want at that node.
For load cases where you don't want to include the displacements, leave "D1" out of the load case and CAESAR II will treat that node as an anchor. When you do want to consider displacements, include "D1" in the load case.
For example:
Node 10: DX=0, DY=0.5, DZ=0, RX=0, RY=0, RZ=0 (you need the zeros otherwise those DOFs are free)
Then:
for (W+T1+P1), node 10 will see: DX=0, DY=0, DZ=0, RX=0, RY=0, RZ=0
for (W+T1+P1+D1) node 10 will see: DX=0, DY=0.5, DZ=0, RX=0, RY=0, RZ=0
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Regards,
Richard Ay - Consultant