CVXPY
Maximize
  Sum(X @ [[2.00 1.00]
 [-2.00 -4.00]], None, False)
Subject To
 14: Pnorm(X, 2) <= 6.0
Bounds
 X free
End
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AFTER COMPILATION
Solver 'SCIP' failed. Try another solver, or solve with verbose=True for more information.
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SCIP
Maximize
 Obj: +2 X_0_0 +1 X_0_1 -2 X_1_0 -4 X_1_1
Subject to
\   [nonlinear] <14>: ((<X_0_0>*<X_0_0>+<X_0_1>*<X_0_1>+<X_1_0>*<X_1_0>+<X_1_1>*<X_1_1>))^0.5 <= 6;
Bounds
 X_0_0 free
 X_0_1 free
 X_1_0 free
 X_1_1 free
End