An item with the same key has already been added

[cromertech]

Trying to do a group policy model on a user to find out what policy a setting is in. All I get returned is

 

An error occurred while generating report.

An item with the same key has already been added.

 

Tried searching these but all I get is something about asp.net which doesn't help with this. There's nothing in the event log. Anyone who can give me help on this?

[X-13]

This the problem?

 

The aforementioned this.

[cromertech]

Not quite it seems as the fix was for the Volume Activation tool however this does give me a better starting point, thanks