Solution or Workaround
What does the error 'Numeric Field Overflow' mean?
Cause:
This error message can occur for a couple reasons:
1: The table or spreadsheet being imported has exceeded the maximum number of characters allowed in an Atlas .dbf table.
2: The table or spreadsheet being imported has one or more column improperly defined as number when they should be string.
Solution:
Change the column definitions in Excel before importing the table or spreadsheet.
If this does not work, try saving the file as a .dbf or .tx tab delimited instead of an .xls.