Yasser,I' have changed it before and works if it is 0.34 instead n_ind=0.34.nThe k_ind dimension looks right. However, I am struggling now with another issue.nI am not able to use m =1 /n_ind = 1/0.34 = 2.9411 defined as power index. It is saying that If the basis is not dimensionless, the power index should be constant. But I understand it is constant as I showed above (m=2.9411). If I directly change m for 2.9411 it works fine.nnThanks.n