ERROR/WARNING WE ARE FACING IN WAVE RESPONCE RUN IN FATIGUE ANALYSIS USING SACS

Hi,

I am doing fatigue analysis. During wave responce run I am getting Error/Warning as 

" *** WARNING MODE 29 HAS   0.849 PERCENT DIFFERENCE AFTER USING   59 PAIRS OF FOURIER SERIES COEFFICIENTS"

This warning is for all modes. Also I have Error in same lst stating

*** ERROR - ITERATION PROCESS NOT CONVERGED

Can any one help me in this regards, any suggestions or Inputs will be appreciated.

Thanx

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