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Introduction - ASCOM-Platform 6.6 SP2

Please see Version 6.6 SP2 for a detailed list of changes and fixes in Platform 6.6 SP2 for both developers and Platform users.

Every ASCOM Platform release aims for 100% backward compatibility with current drivers and applications, providing an easy upgrade path and new capabilities that developers and enthusiasts can exploit.

If you would like to confirm the integrity of the installed Platform, the Diagnostics Tool will provide a wide ranging report through a comprehensive test suite that exercises every aspect of Platform functionality.

Key changes in Platform 6.6 SP2
  • This is a bug fix release with no major changes. A detailed list of fixes is given here: Version 6.6 SP2.
Operating System Compatibility

Platform 6.6 SP2 requires Windows 7 or later together with .NET Framework 4.8. PCs running Windows XP should use Platform 6.4 Service Pack 1 together with .NET Framework 4 Client Profile instead.

Issues and Enhancement Requests

Please use the ASCOM forum: ASCOM Talk Forum at to report and discuss issues that you come across when using the ASCOM Platform. You will find the Diagnostics Tool located in Start Menu / ASCOM Platform 6 / Tools; it will help greatly if you run it before reporting an issue as it provides concrete evidence to help diagnose and resolve the problem.

  • See the section titled Version History for a summary of Platform 6 updates and new functionality.
  • See the section titled Version 5.5 for a summary of Platform 5.5 updates and new functionality.
  • This platform appears as ASCOM Platform 6.6 SP2 in the Apps and add/remove programs dialogues
  • The Platform has been tested in 32 and 64bit bit versions of Windows 7 and Windows 10.
See Also