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Invalid LF Handle

If when opening TDO, an error message displays on screen alerting you that there is an invalid LF Handle, follow the steps below to fix the issue.


Steps to Resolve

  • Delete C:\Program Files\TDOffice\tdo.lf (or on a 64 bit machine C:\Program Files (x86)\TDOffice\tdo.lf)
  • Reinstall TDO
  • Call TDO Tech Support to have the application unlocked

Note: If you are encountering this error, please also check the available space on the C Drive of your computer prior to reinstalling in the event that available space is limited.