looping past index limit

[DebbieInFlorida]

Hey Kids,

THis is a little strange, but probably simple. I am doing a standard loop, but it keeps going past the limit...

Dim FlowRaster(1 To 12) As IRaster
For i = 1 To 12
do some **** here
Next i

i keeps trying to process a 13th entry???? Any ideas?
The reason I set the lower bound index to 1 instead of the usual 0, is just for easier interpretation, these are months.

Thanks