Question: optimal solution for system of equalities


I have system of equations to solve. It has 118 equations and all variables have to be binary. I know for that system that the minial number for x=1 is 32 (I cheked it in solution chapter at the end of the book) but I always get 33 of ones. I changed MaxSols=500 and still got 33. If I change MaxSols to some bigger number the time for calculation is larger and I still don't get the correct solution. Is there any faster way to do this?

I'm thinking (but I don't know how to do in Maple): Is there any way to show solutions only with number of ones in interval, for example 30 to 33.

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