https://community.esri.com/t5/arcgis-online-questions/failed-to-connect-to-database-cannot-load-dll/m-p/1070833#M40830 <P>Hi&nbsp;<a href="https://community.esri.com/t5/user/viewprofilepage/user-id/494911">@BoyuanLu</a>, it looks like you posted this to ArcGIS Online section. You might have better luck posting on ArcMap.</P><P>Some troubleshooting questions:</P><UL><LI>Have you tried the steps in this article:&nbsp;<A href="https://support.esri.com/en/technical-article/000013670" target="_blank">https://support.esri.com/en/technical-article/000013670</A>&nbsp;and on this documentation page:&nbsp;<A href="https://desktop.arcgis.com/en/arcmap/10.3/manage-data/databases/troubleshoot-connections.htm" target="_blank">https://desktop.arcgis.com/en/arcmap/10.3/manage-data/databases/troubleshoot-connections.htm</A></LI><LI>Can you open/connect to the database outside of ArcMap?&nbsp;</LI><LI>Have you updated your OS recently?</LI><LI>Is the database a replica?</LI><LI>If you revert to a previous version of the DB does it open?</LI><LI>Is MSJet the latest version? If not, can you upgrade it?</LI></UL><P>&nbsp;</P> Tue, 22 Jun 2021 04:56:40 GMT Waffle_House 2021-06-22T04:56:40Z https://community.esri.com/t5/arcgis-online-questions/failed-to-connect-to-database-cannot-load-dll/m-p/1070539#M40803 <P>Hi,</P><P>I have encountered with errors when I want to import the Personal geodatabase. I didn't have such errors before, and it just pops up after the weekend. Does anyone know how to deal with this?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="BoyuanLu_0-1624291634698.png" style="width: 400px;"><img src="https://community.esri.com/t5/image/serverpage/image-id/16489i835E3CA1BC68D0F5/image-size/medium?v=v2&amp;px=400" role="button" title="BoyuanLu_0-1624291634698.png" alt="BoyuanLu_0-1624291634698.png" /></span></P><P>&nbsp;</P> Mon, 21 Jun 2021 16:07:31 GMT https://community.esri.com/t5/arcgis-online-questions/failed-to-connect-to-database-cannot-load-dll/m-p/1070539#M40803 BoyuanLu 2021-06-21T16:07:31Z https://community.esri.com/t5/arcgis-online-questions/failed-to-connect-to-database-cannot-load-dll/m-p/1070833#M40830 <P>Hi&nbsp;<a href="https://community.esri.com/t5/user/viewprofilepage/user-id/494911">@BoyuanLu</a>, it looks like you posted this to ArcGIS Online section. You might have better luck posting on ArcMap.</P><P>Some troubleshooting questions:</P><UL><LI>Have you tried the steps in this article:&nbsp;<A href="https://support.esri.com/en/technical-article/000013670" target="_blank">https://support.esri.com/en/technical-article/000013670</A>&nbsp;and on this documentation page:&nbsp;<A href="https://desktop.arcgis.com/en/arcmap/10.3/manage-data/databases/troubleshoot-connections.htm" target="_blank">https://desktop.arcgis.com/en/arcmap/10.3/manage-data/databases/troubleshoot-connections.htm</A></LI><LI>Can you open/connect to the database outside of ArcMap?&nbsp;</LI><LI>Have you updated your OS recently?</LI><LI>Is the database a replica?</LI><LI>If you revert to a previous version of the DB does it open?</LI><LI>Is MSJet the latest version? If not, can you upgrade it?</LI></UL><P>&nbsp;</P> Tue, 22 Jun 2021 04:56:40 GMT https://community.esri.com/t5/arcgis-online-questions/failed-to-connect-to-database-cannot-load-dll/m-p/1070833#M40830 Waffle_House 2021-06-22T04:56:40Z