The File Extensions Database

.DTF File Extension

  • Developer by: IBM
  • Category: Misc Files
  • Format: Binary

What is an .DTF file?

.DTF is Domino Temporary File

File created by Lotus Domino, an enterprise-level application used for business processes and collaboration; stores temporary data used by the server's update task; deleted when the update task has completed.

DTF filenames begin with "IDB" or "S0-S9" and are followed by a unique five-digit number. For example, s054321.dtf and idb98765.dtf are a valid DTF filenames.

Domino temporary files are stored in a temporary directory defined by a system environment variable. If a directory is not specified, the files are placed in the working directory and are not automatically deleted.

NOTE: If DTF files are not automatically removed from the temporary directory, it may be because the server crashed during the update task. In this case, you can shut down the Domino server and delete the files manually.

Programs that open Domino Temporary File
IBM Domino
IBM Domino

How to solve problems with DTF files

  • Associate the DTF file extension with the correct application. On :
    Windows: Right click on any DTF file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.DTF files". Mac: Right click (or Ctrl-click) the DTF file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .DTF is Domino Temporary File. Because only the current version supports the latest DTF file format. Search, therefore, e.g. on the IBM manufacturer website after an available .DTF is Domino Temporary File update.
  • To make sure that your DTF file is not corrupted or virus-infected, get the file again and scan it with antivirus software.