I have a MIQP model with 1074 continuous and 1072 binary variables. I had already successfully tested the model with 43 continuous and 40 binary variables before. But now in the scaled up model, I am having a lot of issues. Not a single feasible solution is found even after running for 2 days non-stop. Surprisingly, when I set the Obj to 0, I get a solution within 40 seconds but with the non-convex quadratic obj function, the model just can not be solved. I see that a lot of extra variables are added. 1074 continuous variables become 142k+ continuous variables and IntInf log starts with 65k+ even though total number of binary variables are just 1072.
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