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Hello everyone! When I was working this warning appeaed, what is the meaning?

Thank you! I resolved it

I don't understand. Could you explain me like if I was a child?

Talking with my master mates, they tell me that the free version have bugs, and it don't work well. There is the problem?

I'm working with a nonlinear estimation (PQL-2) and the estimation control is non-parametric bootstrap with the bias corrected.

The warning stills appears, there is any problem with data, maybe?

Thank you for your fast answer! Now I read that guide and I will tell you if it works.

Good afternoon,

I'm doing a multilevel logistic regression, and when I want the Wald Test this message appears:

function #1 contains no non-zero elements.

I don't understand what's happen here. I REALLY need your help :(

Also, I want apologize for my English level and for didn't introduce me ...