Raster Calc: FocalMean runs but still NoData values remain

Discussion created by beccabourson on Aug 26, 2013
Latest reply on Sep 2, 2013 by curtvprice

The image shows a raster mosaic of three LiDAR rasters. The NoData values did not exist before I ran the mosaic (the empty cells are not the "seams").

The expression I used:
Seamless = CON(isnull([mosaic]), FOCALMEAN([mosaic], rectangle,3,3), [mosaic])

The calculation runs without errors but the resulting raster still retains the empty NoData cells.

Running 9.3

Any suggestions?