I would like to know what means the warning "1 variables dropped from basis". I know that is a symptom that my model have numerical issues, but I would like to know what is happening in the solution process that produces variables drop from basis. Particularly, that problem occurred in my QP model when I disabled Aggregate (set aggregate=0). After that, the root relaxation was solved anyway but in a much longer time. Additionally, I have to say that it was just a test, so I solve my problem with the default value for aggregate and everything go well.
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