subscript out of range

[lvcha.gouqizi]

I define a type

Type Change

nextChanges() As Integer
nextNum As Integer
prevChanges() As Integer
prevNum As Integer
End Type


and an array of type Change
Dim myChanges() as Change

when I fill in data to myChanges like
myChanges(index).nextChanges(subIndex) = ***

It always says "subscript out range". I checked that the index is 1
and subIndex is 10. What't the reason for this?

thank.