-------------------------------------------------------------------------------- [Error Code: 11] Invalid input. A syntax error has occurred. 2] SETS: ^ --------------------------------------------------------------------------------报错如下

根据报错信息，看起来是 SETS 关键字的语法有问题。在 Lingo 中，SETS 关键字应该放在 DATA 关键字之前，而不是在其后。请将 SETS 关键字移到 DATA 关键字之前，如下所示：

TITLE "物流问题"

SETS:
  LOCATIONS /A, B, C, D, E/;

DATA:
  COSTS(A, B) 200, 25
  COSTS(A, C) 0, 20
  COSTS(B, D) 0, 35
  COSTS(C, D) 0, 0
  COSTS(D, E) 100, 15
  DEMAND(A) 0
  DEMAND(B) 0
  DEMAND(C) 0
  DEMAND(D) 0
  DEMAND(E) 0
  CAPACITY 3 4 2 3 4
  UPPER_LIMIT(A) 400
  UPPER_LIMIT(B) 500
  UPPER_LIMIT(C) 350
  UPPER_LIMIT(D) 450
  UPPER_LIMIT(E) 250
  CONSUME(A) 3 4 2 3 4
  CONSUME(B) 3 4 2 3 4
  CONSUME(C) 3 4 2 3 4
  CONSUME(D) 3 4 2 3 4
  CONSUME(E) 3 4 2 3 4
  LIMIT_ABOVE(A, B, D) 200
  LIMIT_ABOVE(A, B, C, D) 300
  LIMIT_ABOVE(B, C, D) 250
  LIMIT_ABOVE(C, D) 150
  LIMIT_BELOW(D) 100
  LIMIT_ABOVE(A, B) 200
  LIMIT_BELOW(C, D, E) 100;

VARIABLES:
  Ax = 0, Bx = 0, Cx = 0, Dx = 0, Ex = 0;

INTEGER VARIABLES:
  Ax, Bx, Cx, Dx, Ex;

OBJECTIVE:
  MIN = 200*(Ax+Bx) + 100*(Cx+Dx+Ex) + 25*Ax + 30*Bx + 20*Cx + 35*Dx + 15*Ex;

CONSTRAINTS:
  Ax + Bx - Dx >= 200;
  Ax + Bx + Cx - Dx >= 300;
  Cx + Bx - Dx >= 250;
  Cx - Dx >= 150;
  Dx >= 100;
  Ax <= 400;
  Bx <= 500;
  Cx <= 350;
  Dx <= 450;
  Ex <= 250;
  3*Ax + 4*Bx + 2*Cx + 3*Dx + 4*Ex <= 3;
  3*Ax + 4*Bx + 2*Cx + 3*Dx + 4*Ex <= 4;
  3*Ax + 4*Bx + 2*Cx + 3*Dx + 4*Ex <= 2;
  3*Ax + 4*Bx + 2*Cx + 3*Dx + 4*Ex <= 3;
  3*Ax + 4*Bx + 2*Cx + 3*Dx + 4*Ex <= 4;
  Ax + Bx <= 200;
  Cx + Dx + Ex <= 100;

END. 

希望这次修改后能够运行成功。