You cannot link TextService in Eudcedit.exe

This article helps to resolve an issue in which you cannot link TextService in Eudcedit.exe.

Original product version:   Windows 10, version 2004
Original KB number:   4568315


Consider the following scenario:

  • You use Windows 10, version 2004.
  • You create or modify end-user-defined characters (EUDC) on the computer.
  • You try to link the EUDC to Microsoft Bopomofo. In this scenario, the EUDC editor returns the following message:
    There is no active TextService that can link to Eudc.

Private Character Editor


After you update to Windows 10, version 2004, Microsoft Bopomofo is updated. The latest version of Microsoft Bopomofo currently doesn't provide the functionality to link EUDC characters.


Method 1

Turn on the Compatibility option to revert to the previous version Microsoft Bopomofo. To do this, follow these steps:

  1. On the Settings page, select Language.

Language image

  1. Select Options for Microsoft Bopomofo (Chinese (Traditional, Taiwan)).

Language options image

  1. Select General.

Bopomofo image

  1. Turn on the "Use previous version of Microsoft Bopomofo" option.

Previous bopomofo image

Method 2

Revert to the previous version of Microsoft Bopomofo by using the following Group Policy setting:
User Configuration > Administrative Templates > Windows Components > IME > Configure Traditional Chinese IME versionGroup policy


This policy was introduced in Windows 10, version 2004.

Method 3

Revert to the previous version of Microsoft Bopomofo by using MDM Policy. To do this, see TextInput/ConfigureTraditionalChineseIMEVersion.