Hi all, I am trying to compute eigen values and eigen vectors using SLEPc eigenvalue solver for a large degrees of freedom system(more than one million). There are cylindrical holes in it where I have assigned some external point masses. I have assembled them in K(stiffness) and M(mass) matrices. While using SLEPc eigenvalue solver, I am getting error- Unable to extract eigenpair from SLEPc eigenvalue solver. The reason is given- Requested eigenpair (0) has not been computed.
Can you please tell the possible reason and its solution.