Hi Good Morning to every one, i am running a model of fan, i am not using cyclic symmetry, i want to see full rotation of fan. Please let me know if any one has idea what is wrong i am doing. The problem what i did is as follows

1) I have done modeling of fan, material,density,section, assignment, assembly are correct  i think.

In assembly i have created 2 RPs to define axis of rotation, i have given Constrains as Copuling of RPs and inner boundary nodes of fan.

2) I have 4 steps,Dynamic explicits, They are Initial,Rotation, Reduced Rotation, Zero velocity.

4) Boundary conditions

    BC1,step-Initial,Velocity/angular velocity, Applied on RP1 and RP2, All selected as Zero except VR1 (not selected since i need rotation about X axis)

    BC2, Step-Rotation, Velocity/Angular velocity, On RP1 & RP2, Selected only VR1-31.4 rad/sec

    BC2,Step-Reduced Rotation, Velocity/Angular velcity, On RP1 & RP2, Selected VR1-6.28 rad/sec

    BC4, step-Zero Velcity, Velocity/Angular velocity, On RP1 & RP2,selected VR1-0 rad/sec

5) Loads

   Body force in terms of inertia, step-Rotation, Given CM1, CM2, CM3

 Body Force, step-Reduced Rotation, Given CM1, CM2,CM3.

 Results i need- want to see stress in fan blades due to body force and rotations.

Error i am getting once i submit the Job is " 2 nodes have dof on which velocity/displ/accn/base motion etc. constraints are specified simultaneously. The nodes have been identified in node set ErrNodeBCReduntantDof."

How can i see which 2 nodes are having problem?

Please correct or guide me how to proceed to see the results.