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I'm developing a new software in Qt but since a few days I get some confusing error messages when I run the project:

mincore\com\oleaut32\dispatch\ups.cpp(2128)\OLEAUT32.dll!75FEEF12: (caller: 75FEE58F) ReturnHr(1) tid(10a0) 8002801D Bibliothek nicht registriert.
mincore\com\oleaut32\dispatch\ups.cpp(2128)\OLEAUT32.dll!75FEEF12: (caller: 75FEE58F) ReturnHr(2) tid(10a0) 8002801D Bibliothek nicht registriert.

After I try to open an XML file with a QFileDialog a new error message appears:

shell\comdlg32\fileopensave.cpp(14267)\COMDLG32.DLL!76FC7BED: (caller: 76FF686C) ReturnHr(1) tid(10a0) 80004005 Unbekannter Fehler
    CallContext:[\PickerModalLoop]

I really don't know how to fix the problem, maybe it exists because of a new windows10 update?

Both of the messages won't crash the program. The first message appears every time I run project, the second only appears when openening an XML file, this also leads to not being able to work with the program because I need to open that XML file. I'm pretty sure the problem does not come in with a code problem.

Does anyone can help me? I reinstalled Qt, the problem still exists.

ke_let
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    Please write your question in English, since [Stack Overflow is an English site.](//meta.stackexchange.com/q/13676) – Suraj Rao Jun 12 '17 at 10:04
  • after changing the language to english in Qt, the error message still appears in german, i hope its ok – ke_let Jun 12 '17 at 10:19
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    reinstall QT, maybe here some information got corrupted – magicandre1981 Jun 12 '17 at 14:12
  • Providing a [mcve] is always useful. – m7913d Jun 13 '17 at 19:53
  • According to https://gitlab.com/tortoisegit/tortoisegit/issues/2967 , not Qt-related. – ivan_pozdeev Jun 13 '17 at 22:28
  • I am experiencing the same issue, except mine is in English: https://stackoverflow.com/questions/44579720/qt-widget-application-library-not-registered-error – tjwrona1992 Jun 16 '17 at 03:15
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    Since this question was also asked very recently it leads me to believe this may be due to a Windows update. I have Windows 10 and I installed updates last night. – tjwrona1992 Jun 16 '17 at 03:16
  • I also did a reinstall of Qt, and the problem still persists. – tjwrona1992 Jun 16 '17 at 03:20
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    I am facing the same problem (Win10, x64 building with Qt5.5, MSVC2013, x32): `mincore\com\oleaut32\dispatch\ups.cpp(2128)\OLEAUT32.dll!76AC5072: (caller: 76ACFE4F) ReturnHr(1) tid(250) 8002801D Library not registered.` appears just before new window shows after calling `QFileDialog::getOpenFileName`. I was able to supress the problem using the `QFileDialog::DontUseNativeDialog` option, but then the Open File window do not have the fully native look. – MaciekS Jul 24 '17 at 12:34
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    Why is this question closed? I have same problem. like @MaciekS. Appearing when I trying to call QFileDialog::getOpenFileName() – GeneCode Sep 20 '17 at 04:11
  • @GeneCode, has `QFileDialog::DontUseNativeDialog` solved your problem? – MaciekS Sep 21 '17 at 09:42
  • @MaciekS i'll try it soon and reply here. – GeneCode Sep 22 '17 at 11:29

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