All about CBO Files

The CBO file type is primarily associated with COMBAS.

CBOFile Extension CBO
File extension: CBO
File type:  Object File / Compiled Program

What is a CBO file

CBO files mostly belong to COMBAS by Living Byte Software GmbH. Use our "Online CBO Text Viewer" below to analyze your CBO file and to see all text it contains.

How do you open CBO files?

You need a suitable software like COMBAS to open a CBO file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CBO file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CBO file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CBO Text Viewer

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Programs that open and convert CBO files:

  1. COMBAS by Living Byte Software GmbH
    See the previous paragraphs to learn more about the main application.
  2. Interactive Training (Bookmark) by Microsoft Corporation
    The Microsoft eLearning Library (MELL) has been retired and is no longer be available for purchase since July 1, 2006. Microsoft Learning Solutions replaces it. Microsoft announced a security risk associated with this file type. Install the patch to prevent it. Program ID is MITrain.Document Related links: Microsoft Security Bulletin MS07-005

Technical Data for CBO File Extension

Related files:
cb0, combo, rli, _rs, ex4

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: MITrain.Document, FileType: Microsoft Interactive Training Bookmark, AppName: Interactive Runtime Engine
EXEFile: ORUN32.EXE

ProgramID: MITrain.Document, FileType: MPIDocument, AppName: Interactive Runtime Engine
EXEFile: orun32.exe

ProgramID: MITrain.Document
EXEFile: %SystemRoot%\Help\SBSI\Training\orun32.exe -f %1


a cbo Object File / Compiled Program is a special file format by Living Byte Software GmbH and should only be edited and saved with the appropriate software.

How to solve problems with CBO files

  • Associate the CBO file extension with the correct application.
  • Update your software that should actually open object file / compiled programs. Because only the current version supports the latest CBO file format. Search, therefore, e.g. on the Living Byte Software GmbH manufacturer website after an available COMBAS update.
  • To make sure that your CBO file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .CBO file online - secure, fast, and no downloads needed.
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