Original tab-delineated database from Now Contact.
Since this is a tab delimitted file, why not use that file format for importing your data?
C L Huddleston:
Thank you for your post.
I'm able to import Excel files (both .xls and .xlsx files) into FileMaker Pro 11.0v4 without any issues. I know that doesn't help you, but if you create a new temporary Excel file, save it, and then have FileMaker Pro try to import that file, does it work? If so, then either the original file is damaged, or FileMaker Pro cannot process something in the file. Therefore, return to Excel, open the original file and the new file, and copy the contents of the original file and paste it into the new file. Save the file and try to import again into FileMaker Pro.
I realize some time has passed since your post, so if you have since found a resolution, please post here so others who have a similar issue can benefit.