runtime error while incresing the couter inside a loop

[Srynx]

When I include i++; inside this loop I get a runtime error and I have no idea why I get it:
Do you have any idea?

while (i <= 3){
        
           if (tauler[PacMan.y][PacMan.x]==0)
               xoc = 0;
           else if (tauler[PacMan.y][PacMan.x]==1)
               xoc = 1;
           else if (tauler[PacMan.y][PacMan.x]==2)
               xoc = 2;
           else 
               xoc = 3;
               
        
         i++;
         PacMan.x += dx;
         PacMan.y += dy;
}

[ArkM]

I can't crank an engine. Look at my car mark, please: it's a Crow Victoria.
Do you have any idea?

http://www.daniweb.com/forums/thread78223.html

[ddanbe]

What was the value of i before you went into the while loop?

[Srynx]

Solved,
tauler[PacMan.y + 1 ] is an invalid vaule.
Thanks to everyone who has helped.