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.
 

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