The query could not be saved due to a problem in transport

After creating a query in BEX, you try and save the query, it gives you the following popup message:

"The query could not be saved due to a problem in transport".

Steps to correct the problem:

1. Within Adminstrator Workbench click on the Transport Connection tab in the Navigation Window on the left
hand side.

2. Select the Request BEx button on the toolbar.

3. Create a transport.

4. Try to change the query again.