Commented Unassigned: Conflict between task panes and XLA since Excel 2013 [22208]

Hi

I'm faced with a weird behavior.
Net Office task panes are not visible anymore in Excel 2013 when an XLA is enabled.
To reproduce the problem, I used any of the samples provided creating a task pane, and I active an XLA.
Each of "Solver addin", "Euro currency tools" and "analysis toolpak" XLA provided with Excel 2013 creates the problem.

A workaround is to uncheck "Show the Start screen when this application starts" in Excel options "General" (at the bottom)

Any idea what is going on ?

Thanks
Comments: ** Comment from web user: juflo **

After further investigations, moving the creation of a task pane (ICTPFactory.CreateCTP) outside of the ICustomTaskPaneConsumer.CTPFactoryAvailable method solve the problem.
If that helps ...