Description
No raster files for the selected input format (CADRG/ECRG, CIB, DTED, or HRE) were found in the input folder. Consequently, no mosaic dataset will be created for that format.
Solution
Verify that files of the selected format (CADRG/ECRG, CIB, DTED, or HRE) exist in the input folder. Use a file browser to search for the file extensions you are expecting in the input folder. Then verify that the correct file extensions are listed on the Raster formats tab of the Raster and Imagery options.