Raster Calc: FocalMean runs but still NoData values remain

[BeccaBourson]

[ATTACH=CONFIG]26992[/ATTACH]

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?

Thanks.

[curtvprice]

Are you certain these areas are really NoData? If you view a raster zoomed out sometimes the pyramids are not displayed correctly (especially with 9.3).

The other issue I'd look into is whether NoData is being handled correctly. Again, this requires zooming in to these areas and looking at the specific input and output values for specific cells.