If the grid you are printing displacements for is only attached to a solid element, it will only have 3 translational reaction forces. Solid elements only provide translational stiffness.
If the grid is attached to shells, beams, rigids, etc, then there will be translational and rotational reactions.
Thank you for your answer.
But I am using CTRIA3 element that are shells. I am simulating a cantilever plate with enforced displacement and rotations at its root.
I have all 6DOF reaction forces. But the rotations (exept for the constrained nodes in which I have assigned a rotation) are zero.
This is part of my input file.
NASTRAN SYSTEM(442)=-1, SYSTEM(319)=1
ECHO = NONE
DISPLACEMENT(SORT1,PLOT) = ALL
ACCELERATION(SORT1,PLOT) = ALL
SPCFORCE(SORT1,PLOT) = ALL
GPFORCE(SORT1,PLOT) = ALL
ELSTRAIN(SORT1,PLOT) = ALL
DLOAD = 1
SPC = 1
IC = 1
TSTEP = 1
$ Parameters for SOLs 601
$ Parameters for SOLs 129
$ Strategy Parameters for SOLs 601 and 701
NXSTRAT 1 SOLVER 0 AUTO 0 NPOSIT 0
+ MASSTYP 0 TINTEG 0 ALPHA 0.25
+ DELTA 0.5