即使代码没有错误，我也无法模拟CPLEX模型

我对我正在尝试编写的CPLEX代码有一些疑问 . 代码本身（模型）似乎编写得很好，但是当填写数据时我有错误 . NOTE: there are no constraints in the model because i'm trying to make a trial of the model just to see that it works.

这是代码：

using CP;

// NETWORK+PARAMETERS

int trucks=...; // set of trucks
range truck= 1..trucks;

int capacity [truck]=...; // capacity of a truck

tuple nodeinfo {
string name; // name of a node
int starttime; // available start time 
int endtime; // available end time
float demand; // demand from a node
}

{nodeinfo} departurenode=...; //size=4
{nodeinfo} arrivalnode=...; //size=4
{nodeinfo} startingnode=...; //size=4

// OPTION 2: vector of nodes
//each node has tuple structure nodeinfo
//length of the vector is length of dataset
//read data from dataset
//void* node = new {nodeinfo} [k];

tuple arc {
nodeinfo departurenode; //departure node of an arc
nodeinfo arrivalnode; // arrival node of an arc
nodeinfo startingnode; // starting node of an arc
int traveltime; // travel time of an arc
}

{arc} arcs=...; //number of arcs (24)

float cost [arcs][truck]; //cost of using an arc by a truck 

// option2: int arc[i in departurenode,j in arrivalnode,k in startingnode]=...; //arcs (size=24)
// how can i create a setof arcs taking into account the info from each arc??

// VARIABLES
 
dvar boolean x [arcs,truck]; // 1 if truck uses the arc, 0 otherwise (array of size 24x7)
dvar int+ arrivaltime [arrivalnode,truck]; //arrival time of a truck at a node (array size of 4x7)


// OBJECTIVE FUNCTION 
 
dexpr float totalcost = 
sum (i in arcs, j in truck) x [i,j] * cost [i,j];	
 
minimize totalcost;

// CONSTRAINTS

subject to {}

execute {
  writeln(arcs);
};

这是数据：

trucks= 2;
 
 departurenode= [[A,0,10000,0],[B,0,10000,0],[C,0,10000,10],[D,0,10000,10]];
 
 arrivalnode= [[A,0,10000,0],[B,0,10000,0],[C,0,10000,10],[D,0,10000,10]];
 
 startingnode=[[A,0,10000,0],[B,0,10000,0],[C,0,10000,10],[D,0,10000,10]];
 
 arcs= [[<A,0,10000,0>,<A,0,10000,0>,<C,0,10000,10>,5], [<A,0,10000,0>,<A,0,10000,0>,<D,0,10000,10>,5],
 [<B,0,10000,0>,<B,0,10000,0>,<C,0,10000,10>,5], [<B,0,10000,0>,<B,0,10000,0>,<D,0,10000,10>,5],
 [<C,0,10000,0>,<C,0,10000,0>,<A,0,10000,10>,5], [<C,0,10000,0>,<C,0,10000,0>,<B,0,10000,10>,5],
 [<D,0,10000,0>,<D,0,10000,0>,<A,0,10000,10>,5], [<D,0,10000,0>,<D,0,10000,0>,<B,0,10000,10>,5]]
 
 cost= [<1,1>,<1,1>,<1,1>,<1,1>,<1,1>,<1,1>,<1,1>,<1,1>]

***NOTE: in each gap of the arc before the travel time (last gap value=5) must be the data from departurenode, arrival node and startingnode but it's not shown and i don't know why ***

另一个疑问：关于模型的约束，我不知道如何将它们写入CPLEX .

1）starttime <=到达时间<= endtime //（对于每个到达节点）

2）x *（到达时间（节点i）旅行时间）<=到达时间（节点j）

3）将每辆卡车的可变到货时间初始化为0.（在模拟开始时）

4）每个到达节点的需求必须等于（选择的弧数*卡车的容量）的总和

非常感谢 .