No Solution to Eigen Value Problem

Why does Ansys does not output any eigenvalue for the model?

This happens when Ansys is not able to find solution to the eigenvalue problem. User may try to insert a Command Snippet object with command BUCOPT under Analysis. It is recommended to input a nonzero SHIFT value and a reasonable LDMULTE value (i.e., a smaller LDMULTE that is closer to the last buckling mode of interest) when numerical problems are encountered.