After installing OpenBuildings Designer Update 9 my Office applications such as Word and Excel started generating this error message and will not open:
In one other isolated case the 64bit Access Database Engine caused a conflict with the Outlook Exchange server. This Microsoft article addresses the Outlook MAPI in both 32-bit and 64-bit versions, in conjunction with both 32-bit and 64-bit versions of Office itself.
This issue, which has been filed as Defect 957663, is specific to 32-bit Office and is the result of a conflict with the Microsoft Access Database Engine. Transitioning to 64-bit Office should resolve the error and allow all Office applications to function as expected.
In the interim, if you need to continue using 32-bit Office the following steps offered on Stack Overflow may help, though they require manual editing of the Windows registry so caution is advised. Only attempt these steps if you are comfortable using Regedit and installing applications using a command line parameter.
https://stackoverflow.com/questions/12270453/ms-access-db-engine-32-bit-with-office-64-bit
After following these steps the registry key value that points to the 64-bit version of "mso.dll" (Microsoft Access Database Engine) will be removed since it should not be used by 32-bit Office.