I am getting infinity problem in an iPhon application. The problem is very strange. I need to calculate the zoom limit using the following formula.

```
zoomLimit = 1/(mapState.iBufferMult*0.75);

```

The value of mapState.iBufferMult = 3

The problem is that most of the type the formula gives the correct value 0.44. But sometimes it gives INFINITY.

Can anyone tell me why it is doing like that.