Paul, We had a similar thing happen with our robot. We have 3 

missions/programs. Two were working fine, but the 3rd program got an 

error message and we couldnt figure out why. We reloaded software and 

continued to get error messages. Once we deleted that one program the 

other 2 worked fine. We have deleted that program and are working on a 

new version now. I don't know what about the program caused the problem, 

but sounds similar to the problem you encountered.  Good luck!  Renee 

Jensrud,    Got Lego?





On Thu, Oct 20, 2011 at 9:51 PM, Bobby p. Carder wrote:



> Ok...this is two in one day...but I swear there is a goblin wreaking 

> havoc

> with our bot/program.

> This error occurred when we downloaded a program to the brick and it

> subsequently said that there is a "missing required file" and to 

> reload the

> software or nxt driver.  In nutshell, after reinstalling everything 

> there is

> to reinstall, including firmware, software, etc and rebooting and 

> praying to

> the Lego Gods for mercy after several hours of torture.  We still got 

> the error.

>

> Then we took our program to another computer and downloaded it to a

> different brick.  Voila!  It happened again.  Ok..to shorten a very 

> long

> story....we have deduced that the particular robot program we were 

> working

> on is somehow corrupt (???).   What is really bizarre is that every 

> other

> program will give the same error if opened after the 'bad' program. 

> But! If we close down the NXT software and reopen a new program 

> (without opening

> the 'bad' program), it doesn't happen.

>

> Anyone ever seen this before?  I can't find anything greyed out, 

> nothing

> looks obvious...but I am new at this, it's pretty easy to trip me up. 

> I

> guess the kids will just have to rewrite the program?  But I am not

> confident that another program will do the same thing.

> Thanks for your help - Paul Carder, The Lost Marbles

>

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