Errors Upgrading From Vault Standard 7 to 9

[RBLOCK]

We upgraded from Vault Standard 7 to 9. I am unable to open any solutions in Visual Studio that were previously bound to Vault.

The errors are:
Failed to register project with Sourcegear Vault Studio Enhanced Client. The project is bound to the Classic Client or another MSSCCI provider.

How do I get around these errors? I've tried to unbind and un-check out from the client, but it still won't let me open the solution.

[Beth]

We are currently working on this issue offline.

HS: 248531