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The registry setting appears to not be correct. Install or repair access drivers install on the hosting server.
How to fix the error "InvalidCastException: Unable to cast COM object of type 'System.__ComObject' to interface type 'DAO.DBEngine'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00000021-0000-0010
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(163.2, 2%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDE%3C/text%3E%3C/svg%3E)
Devi E
5
Reputation points
Hi, I am trying to access DAO.DBEngine for an operation and getting the error " InvalidCastException: Unable to cast COM object of type 'System.__ComObject' to interface type 'DAO.DBEngine'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00000021-0000-0010-8000-00AA006D2EA4}' failed due to the following error: Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED))."
This was working fine, but recently we started receiving this error, can someone provide a suggestion to resolve this error
Developer technologies ASP.NET ASP.NET Core
Developer technologies C#
11,567 questions
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Anonymous2025-01-31T02:27:44.5333333+00:00 Hi @Devi E , you mentioned "This was working fine, but recently we started receiving this error" so that I'm afraid this is resulting from some update (within your application or the app-hosting server or somewhere else), could you please help check it first? In the meantime, may I know how the exception throw? For example, after opening a software, or running a script or something else executed and then this exception occurred?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 2%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EUS%3C/text%3E%3C/svg%3E)
Ulbricht, Silva 0 Reputation points2025-05-14T07:27:37.2633333+00:00 gibt es für dieses Problem eventuell schon eine Lösung. Wir sind auf das selbe Problem gestossen und eine Fachanwendung Gavia funktioniert aus diesem Grund nicht.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 61%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
Bruce (SqlWork.com) 77,686 Reputation points Volunteer Moderator2025-01-30T16:38:24.64+00:00 -
Ulbricht, Silva 0 Reputation points
2025-05-14T07:29:07.5233333+00:00 das hat leider nicht geholfen. Wir haben das Office 2021 sowie die Access Runtime deinstalliert, Server neu gestartet und Office 2021 sowie Access Runtime in einer Konfig installiert. Fehler bleibt.
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