I remember that error for the V3 days, there were two possible causes (if memory serves me right).
1) When importing the survey data its likely a version issue they are seeing:
- If they are using DC files have them delete their (23.0 or similar file) from their TBC App Data folder. A new folder will populate there when restarting TBC.
2) The version of excel they are using (especially if its Office 365) is not being handled properly
- Have them save the points file as a MsDos .CSV file type and import that.