I've heard others recommend  downloading the latest firmware so I suppose that's a good place to start.   If you are still seeing the  problem, then I would isolate the problem block by removing sections of the program until you get the download to work.  ( don't save the file).   Once the block is isolated then replace it with a  new one.  

That seems to work for my team although if there is a better solution, I'd sure like to hear it.

David


On Nov 2, 2008, at 6:03 PM, Karen McSweeney Contreras wrote:

We are suddenly having trouble with our robot accepting downloads from our laptop computer.  We get an error message on the laptop computer that says “There is a data wire that does not have a data source.  Error # 5021.”  But there do not appear to be any wires that are not connected!!  We tried connecting a different NXT robot to the laptop and we get the same problem; so we know it is the program, not the robot.  We deleted the program and reloaded it.  Nothing has helped.
Any thoughts on a solution or where I can find a solution?
 
 
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