050022 : Invalid pyramid level definition.


One or more of the pyramid levels provided are either formatted incorrectly or not legal relative to the existing pyramid definition.


Review the help for the geoprocessing tool, including the "Learn more about" section. If the format of the numbers you provided is correct, then review the existing pyramid definition for the terrain through the terrain properties dialog box in ArcCatalog. If you're adding a level with the largest resolution, then the scale denominator should also be the largest.