TFS error: item has pending changes but does not exist locally

In the Solution Explorer:

• right click on file that gives error=>Source Control=>Undo Pending Changes.

• right click on file=>Add file to Source control.

Now you are good to go.

Not sure about this but have you checked out a different workspace? Try going to View->Other Windows->Source Control Explorer, then open the Workspace dropdown near the top of the screen, and select "Workspaces..