Hello,
The message is indicating that you have a prescribe displacement trying to move node 1 in the X direction, but the boundary condition at node 1 prevents motion in X. You cannot have it both ways!
My guess is that you need to read this paragraph from the documentation:
Specify the magnitude of the prescribed displacement that will be applied to each selected item in the Magnitude field and the direction of the prescribed displacement in the Direction section. If you select the Scalar X, Scalar Y, or Scalar Z radio button, only the translation or rotation in that direction will be constrained; the other directions will be free to move. If you select the Vector radio button, the translation or rotation in all three directions will be constrained. For example, if you add a prescribed displacement of magnitude -1 inch and select the Scalar Y radio button, the analysis will result in a reaction force along the Y direction only. The node will be free to move along the X or Z directions. If you add a prescribed displacement of magnitude 1 inch and select the Vector radio button and define a vector of (0,-1,0), the analysis will result in reaction forces in the X, Y and Z directions. The translation in the X and Z directions will be kept at 0. (from the page "Help > Autodesk Simulation > Setting Up and Performing the Analysis > Setting Up Part 2 > Nonlinear Analyses > Loads and Constraints > Prescribed Displacement")
John Holtz, P.E. Global Product Support
Autodesk, Inc. If not provided already, be sure to indicate the version of Inventor Nastran you are using!"The knowledge you seek is at knowledge.autodesk.com" - Confucius 😉
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