This message occurs when attempting to import a binary raster file into ArcView:
"Error: File .../grid.flt does not exist."
The file name and/or the paths of the input and output directories are not 8.3 compliant.
Solution or Workaround
Make sure the binary raster file (.flt) and the associated header file (.hdr) have the same name.
On UNIX platforms, make sure the casing of the file names is identical. For example, if the name of your binary raster file is mygrid.flt, and the header file is named myGrid.hdr, rename both files to match the casing.
Make sure the name of the binary raster file (.flt) and the associated header file have names that are no less than three and no more than eight characters in length, and have a three-character extension (.flt, .hdr).
Make sure the input directory path to the data being imported, the name of the output grid that will be created, and the output directory path where the resulting grid will be saved to contains directory names, are no less than three and no more than eight characters in length.