Skip to Content

Invalid LF Handle

Overview

When opening TDO,  if an error message displays on screen alerting you that there is either an Invalid LF Handle or Error 13 Wrong Password, follow the steps below to fix the issue.

Detailed Instructions

  1. Delete C:\Program Files\TDOffice\tdo.lf (or on a 64 bit machine C:\Program Files (x86)\TDOffice\tdo.lf).
  2. Reinstall TDO (Click HERE for instructions on installing TDO).
  3. Call TDO Tech Support at (858) 558-3696 to have the application unlocked.

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