Please assistance, general protection mistake

Hello, I am quiet annoyed about a mistake in my program, it marks no mistakes and no warnings, however, each time it runs, when i try to call a function, it marks a mistake that says:

General Protection Exception
programname.cpp 70
programname(2) 0x2327:0x014f processor Fault

then it marks one line of my program and it breaks the process.
the line is marked blue, but I don´t know what it is doing wrong
the program won´t run after that until I compile it again, and it marks neither mistakes nor warnings,but keeps marking the mistake time after time when I try to run it.

Please, can someone explain to me what could be wrong, if you believe I should place the code here i will.

Well since you haven't shown any code, the best I can give is a guess. Check and see if it's possible if you've overrun (or underrun) any buffers. Writing outside a buffer is the most common cause of a runtime error.

this is the function:

Code:

---

void seleccion (int arr[], int a){
 int  b, menor, d, e;
for(b=0;b<a;b++){
  menor=arr[b];

        for(d=b+1 ;d<a;d++){
        if (menor>arr[d]){
          menor=arr[d];
          e=d;}
        }
          arr[e]=arr[b];  //this is where the mistake is marked

          arr[b]=menor;

        }
 for(b=0; b<a; b++)
 printf("%d ", arr[b]);

 }

---

> arr[e]=arr[b]; //this is where the mistake is marked
You might want to print out the value of e here. If the preceeding if() is never true, e may be uninitialized.