Toad World® Forums

Error on SSMS load after Toad 6 installation



Yesterday I just installed Toad 6, but after that, everytime I open SSMS I get a Toad-related error.

Toad for SQL Server: InvalidCastException
Unable to cast object of type ‘Microsoft.Management.SqlStudio.Explorer.ObjectExplorerService’ to type ‘Microsoft.Management.SqlStudio.Explorer.ContextService’

Any ideas?


Hi, it is known issue, see Release Notes (ST109699). You can contact Support to obtain hot fix.

I also uploaded hot fix here for the convenience:…/

Just copy and replace all files from archive to c:\ProgramData\Microsoft\MSEnvShared\AddIns\


Cool, thanks! I can confirm it worked.


Hi Alexander,

Here is a similar issue posted in SQL Optimizer for SQL Server Community.

He/she copied all DLL files from the hot fix, but it doesn’t work. Could you please help?




As you already know Toad has a plug-in which integrates into ManStudio and helps you to run Toad’s features from the context of ManStudio.

There is support for 2012 and 2008R2 versions only.

If you experience any related issue please see following link troubleshooting:…/Default.htm