Event 4096 is logged if the WarmUp entry is set for VSTO add-ins in Outlook
Original KB number: 4017116
When you install and register Visual Studio Tools for Office (VSTO) application-level Add-Ins for Microsoft Office, there's an optional registry entry named
Warmup, which can be set.
The Registry entries for VSTO Add-ins explains as follows:
|Warmup||REG_DWORD||Optional. A value that indicates that the .NET Framework and Visual Studio Tools for Office runtime load before an add-in loads and reduce the perceived time to load an add-in. Set the
If this entry is enabled (set to 0x1), the following event is logged in the Application log when the application starts and loads the add-in:
Event ID: 4096
Customization URI: file:///C:/Program Files (x86)/Common Files/Microsoft Shared/VSTA/Pipeline.v10.0/PipelineSegments.store
Exception: Exception reading manifest from file:///C:/Program%20Files%20(x86)/Common%20Files/Microsoft%20Shared/VSTA/Pipeline.v10.0/PipelineSegments.store: the manifest may not be valid or the file could not be opened.
This event can be safely ignored and does not affect the functionality of either the application or the add-in.