I tried solving my model with xpress:
pip install xpress
And then in the model:
Solver = SolverFactory('xpress') SolverResults = Solver.solve(myModel)
I get this error:
FICO Xpress Solver 64bit v8.5.6 Oct 17 2018 (c) Copyright Fair Isaac Corporation 1983-2017. All rights reserved Optimizer v33.01.09 [C:\xpressmp\bin\xprs.dll] Reading Problem \tmp11lp1xyd.pyomo Problem Statistics 30975 ( 0 spare) rows 3073 ( 0 spare) structural columns 101189 ( 0 spare) non-zero elements 2304 quadratic elements in 240 quadratic constraints Global Statistics 0 entities 0 sets 0 set members FICO Xpress v8.5.6, solve started 10:52:18, Jun 27, 2021 Minimizing QCQP \tmp11lp1xyd.pyomo Original problem has: 30975 rows 3073 cols 101189 elements 240 qrows 2304 qrowelem ?900 Warning: The quadratic part of row 'c_u_x33568_' defines a nonconvex region. Please check your model or use Xpress-SLP ?422 Error: Solution is not available
Any suggestions? How can I use this “Xpress-SLP” in python with pyomo? Is it some different solver that I would need to install like?
pip install slpxpress