# No mapping for the Unicode character exists in the target multi-byte code page.

**URL:** <https://forums.toadworld.com/t/no-mapping-for-the-unicode-character-exists-in-the-target-multi-byte-code-page/40614>\
**Category:** Toad for Oracle & DevOps Toolkit\
**Created:** [February 20, 2018, 9:13am UTC](https://forums.toadworld.com/t/no-mapping-for-the-unicode-character-exists-in-the-target-multi-byte-code-page/40614 "2018-02-20T09:13:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![xiu.yang](https://avatars.discourse-cdn.com/v4/letter/x/c89c15/32.png) [@xiu.yang](https://forums.toadworld.com/u/xiu.yang)\
**Post date:** [February 20, 2018, 9:13am UTC](https://forums.toadworld.com/t/no-mapping-for-the-unicode-character-exists-in-the-target-multi-byte-code-page/40614/1 "2018-02-20T09:13:54Z")

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Every time I try to connect to a schema or close a connection, I will get this error message popup “No mapping for the Unicode character exists in the target multi-byte code page.”

And when I don’t receive this error message, my Toad becomes not responsive. The error message is the blocker, I can’t make connection or disconnection without clicking on the error message.

My machine is Windows 10 version 1607 build 14393.2068

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<div class="post-metadata">

**Author:** ![Gary.Jerep](https://sea1.discourse-cdn.com/quest/user_avatar/forums.toadworld.com/gary.jerep/32/205_2.png) [@Gary.Jerep](https://forums.toadworld.com/u/Gary.Jerep)\
**Post date:** [March 12, 2018, 12:04pm UTC](https://forums.toadworld.com/t/no-mapping-for-the-unicode-character-exists-in-the-target-multi-byte-code-page/40614/2 "2018-03-12T12:04:33Z")

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Best if you could open a Support ticket with our Engineers, but until then, I’m wondering if this issue is caused by corrupted files (somehow) when you imported user files from a previous version of Toad.

See, for example, a similar issue here:

[https://support.quest.com/toad-for-oracle/kb/234511/importing-user-files-causes-an-error-in-toad-for-oracle-12-12](https://support.quest.com/toad-for-oracle/kb/234511/importing-user-files-causes-an-error-in-toad-for-oracle-12-12)