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I am kind of new in LEGO MINDSTORMS, I tried to download a program to the NXT robot and got the Error code 7- "Cannot download needed file for the program" - can someone tell me what should i do?

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Try uninstalling and then reinstalling the NXT programming software. That might help. – bsaat Jan 8 '14 at 21:53

This is most probably an accessory file (sound or image) not present on your machine. Verify all the sound or display blocks that might use such non-standard contents.

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