The export from either Meet Manager or Team Manager for Swimming must be a roster file (File > Export > Athletes/Teams)

In Track & Field Meet Manager
  1. Go to File > Import > Swimming Rosters
  2. Select correct file
  3. Click OK

In Track & Field Team Manager
  1. Go to File, > Import > Athlete Roster from Swimming
  2. Select file and click Open
  3. Choose options for overlaying existing information
  4. Select team to assign athletes to
  5. Click OK