How to solve Langrage Multiplier

Why i cannot solve the langrange...it say empty double matrix...please someone help me

SF=[    0   -2/3    -1/3
        0   -1/3    -2/3
        0   1/3     -1/3    ];
A=[ 1   0
    0   1
    0   0   ];
B=[ 0
    0
    1   ];

PLmax=[ 30
        150
        150 ];

    Cost=[  10
            12
            11  ];

syms P1 P2 Pd
Pgen=[  P1
        P2];
    
f=10*P1+12*P2;  %obj func
Lmda=Pd-(P1+P2)==0;

Pi1=SF*(A*Pgen-B*Pd)<=PLmax;
Pi2=-SF*(A*Pgen-B*Pd)<=PLmax;
P1,P2>=0;
Pd==150;

Sol=solve ([f,Lmda,Pi1,-Pi2],[ P1 P2 Pd ])