You cannot link TextService in Eudcedit.exe

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

Applies to:   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.

Screenshot of the error message in 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.

    Screenshot of the Options in the Chinese (Traditional, Taiwan) item under Language page of Settings.

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

    Screenshot of the Microsoft Bopomofo option in the Language options: Chinese (Traditional, Taiwan) page.

  3. Select General.

    Screenshot of the General option in the Microsoft Bopomofo page.

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

    Screenshot of the Use previous version of Microsoft Bopomofo option in the General page.

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 version

Screenshot of the IME group policy setting window.


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.