This video tells the story of someone who created an Excel 2003 workbook project in Visual Studio 2008. No matter what configuration he tried on the client machine, he got this error when opening the workbook:
The assembly could not be found or could not be loaded.
Here’s the setup:
Windows XP Professional
PIAs for Office 2003 are installed
VSTO version 3 runtime is installed
The .NET 2.0 configuration tool shows the assembly is trusted
CASPOL.exe shows the assembly is trusted
Fortunately, the story has a happy ending.
Video duration: 1 minute, 36 seconds