045001 : Input dataset(s) error. <Value>
The error has an associated description (e.g., field does not exist, table is incomplete, invalid dataset, invalid number of datasets, etc.)
Review datasets and input parameter values, and correct according to specific error message. If you are using a geostatistical layer created in ArcGIS 9.1 or earlier, and the link to the dataset that was used to create the layer has been broken, you should add the layer to the table of contents of your ArcMap project and repair the data link before rerunning the tool.