Determinant of stiffness matrix is shown as 'Inf

i calculated the combined stiffness matrix of a plate element with rectangular finite element. while the displaying the determinant combined stiffness matrix, it says "Inf". the combined matrix is a square matrix (i have checked for the error) and could not find any . Can anyone help on this issue?

[Steven Lord]

How are you planning to use the determinant information? If you're trying to use it to determine if the matrix is singular, don't.

A = eye(500);
det(A) % A is non-singular, obviously

B = 0.1*A;
det(B) % but B is? Underflow.

C = 10*A;
det(C) % Overflow.

Use the condition number if you're trying to determine if a matrix is well-conditioned.