When computeIIS is called and the infeasable constraints are written to ilp file on a model that is infesible due to default lower bound of a variable being 0, the default lower bound doesn't appear in the ilp file. That is super misleading to the user.
m = Model('sth')
x0 = m.addVar(name='x0')
m.addConstr( x0, GRB.LESS_EQUAL, -1 )
\ Model sth_copy
\ LP format - for model browsing. Use MPS format to capture full model detail.
R0: x0 <= -1
Please fix this !!!
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