*** ERROR # 163 ***

  Too many vibration modes exist in the range of interest.

   Solver error no. =    725

         subcase id =      1

  This error happens as there are more than 500 eigenvalues calculated

  internally in the range of interest.

  The solver may require manual input to help targeting the frequency region

  of the desired modes. Please try the following two methods:

  1) Narrow the range of interest by adjusting the lower and upper bounds.

  ...