Optimization converged.

Now I am calculating I-V curve. K point is 2*5*60. At 1st point calculation converged in 40 steps, at 2nd point it didnot converged. Please see the attachment. When K point was 2*5*50, then at 1st point calculation conversed in 38 stepst and at 2nd point calculation converged in 95 steps and at 3rd point calculation did not converged. Attachment is for k=2*5*60 How to currect it

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Thanks