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@AntoinePrv Thank you for your reply, I've tried writing __ deepcopy__ Method to copy multiple inherited classes, but ecole core. scip.Model class No constructor defined，Very frustrating. I wonder if you...

hello, For subset_select_B_on_139_off_138.mps.txt and subset_select_C_on_153_off_152.mps.txt. I doubt these bugs due to the shrinkproblem in the HPresolve.cpp, so, I tried to execute more shrinkproblem, when presolve back to the main while...