ListInterpolation::ingrdm
An error occurs because the grid range in the second argument is expected to be specified using a sublist for each dimension:
ListInterpolation[{1, 9, 16, 25, 49}, {1, 3}]This shows a valid grid specification in ListInterpolation:
ListInterpolation[{1, 9, 16, 25, 49}, {{1, 3}}]