NUMBER OF EIGENVALUES FOUND ON THE INTERVAL EXCEEDS THE EXPECTED NUMBER.

Hello Experts,

I am trying to extract the eigenvalues of the User-Defined Element. I am getting following error when I try to extract frequencies using Lanczos method

*Frequency, eigensolver=Lanczos, acoustic coupling=off, normalization=displacement
3,,,, , ,

Please help me to resolve this error. Please find the message file in attachment.

SHIFT IS DETERMINED IN ORDER TO CLOSE GAP BETWEEN TRUST INTERVALS
 NEW SHIFT          1.00000e+000
 
 NUMBER OF NEGATIVE EIGENVALUES    11
 NUMBER OF POSITIVE EIGENVALUES   197
 NUMBER OF NEGATIVE EIGENVALUES NOT ASSOCIATED WITH LAGRANGE MULTIPLIERS    11
 NUMBER OF NEGATIVE EIGENVALUES ASSOCIATED WITH LAGRANGE MULTIPLIERS         0

 ***ERROR: NUMBER OF EIGENVALUES FOUND ON THE INTERVAL EXCEEDS THE EXPECTED
           NUMBER. THIS MAY HAPPEN IF A SYSTEM IS OVERCONSTRAINED. RUN A STATIC
           PERTURBATION ANALYSIS TO PERFORM THE OVERCONSTRAINT CHECK. ALSO THIS
           MAY HAPPEN IF A SYSTEM HAS RIGID BODY MODES AND NO SHIFT IS GIVEN