The following file formats are no longer supported in Office Excel 2007. You cannot open or save files in these file formats.
Format
Extension
Clipboard type identifiers
Excel Chart
.xlc
Excel 2.0, 3.0, and 2.x file formats
WK1, FMT, WK2, WK3, FM3, WK4
.wk1, .wk2, .wk3, .wk4, .wks
Lotus 1-2-3 file formats (all versions)
Microsoft Works
.wks
Microsoft Works file format (all versions)
DBF 2
.dbf
DBASE II file format
WQ1
.wq1
Quattro Pro for MS-DOS file format
WB1, WB3
.wb1, .wb3
Quattro Pro 5.0 and 7.0 for Windows.
Tips for file formats that are not supported by Excel
If a file format that you want to use is not supported in Excel, you can try the following:
Search the World Wide Web (WWW) for a company that makes file format converters for file formats that are not supported in Excel.
Save to a file format that another program supports. For example, you may want to import your spreadsheet into another program that does not support the Excel file format. But the other program may be able to import another supported file format, such as an XML spreadsheet or a text file format. In this case, you can save your workbook to the XML spreadsheet format, and then from the other program, import the XML file.
