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David,
 
We started up the NXT ( we have version 1.0) fresh today, after a good rest. and everything worked fine, it took the block plus several more!  We did discuss one common factor, this seems to happen after the robot has been in use for maybe 2 or so hours with LOTS of programming or changes to a program.  Any thoughts? 
The blocks are no longer on the program for me to attatch, the student took them off when he could not get them to work.  I did look at them and they were simple move blocks, ports b and c, 75 % power, 2 rotations, brake.  The original block was done in degrees, they have learned how to access the view window and push  the robot manually  to it's desired stopping point and then key in the degrees on the move block.
 
Thanks,
Tracy
 
In a message dated 11/26/2008 10:24:12 A.M. Eastern Standard Time, [log in to unmask] writes:

In that case the obvious answer is out of  memory error when downloading
but from what you are saying there is no such error and it appears to
download just fine.  Therefore I think you are making a assumption that
the block was not included.    There may be physical conditions where
they block does not appear to run.
Can you you attach your program?

Also do you want to cc the listserv again since there are a couple of
others that have chimed in?

David

[log in to unmask] wrote:
> Hi David,
> Yes, a team member had 15 blocks and added another and it would not
> transfer it to the NXT.  He also added 4 identical blocks and they
> would not download.   We have also had this problem where we would add
> a move forward mini move it would not pick it up on the NXT so we
> would put an identical move block in front of it and it would take
> it?  I will be sure the kids are "saving" the new move before
> downloading.  It happens sporadically. There is no problem dragging
> the move block and having it show up on the computer screen, it just
> does not always transfer to the brick. We download and it downloads as
> always (compiling info is up on the screen and we get the beep when
> finished) There does not seem to be any rhyme or reason to this, it
> has only happened with one or two long programs.  We reboot everything
> and keep playing with it and usually it will end up taking it so we go
> back and delete the "phantom blocks that are identical" and all is
> well.      I was reading up on My blocks to see if that would help. I
> can't find anywhere in the NXT book where there are limitations on
> blocks in a program.

> Thanks,
> Tracy


> In a message dated 11/26/2008 9:15:18 A.M. Eastern Standard Time,
> [log in to unmask] writes:
>
>
>     Hi Tracy,
>     What do you mean by " it will not take anymore "?    Is it that
>     you can
>     not drag in another block, save the program, download to the brick?
>     David
>
>     Tracy Reed wrote:
>     >
>     > Hi,
>     > I was wondering if anyone knows what the # of move blocks a single
>     > program can use.  It seems we are writing programs and when we
>     get to
>     > approx. 15 blocks it will not take anymore.  Is there a way
>     around this?
>     >
>     > Your input is greatly appreciated.
>     >
>     > Tracy Reed
>     > 4-H L.E.A.D Huskies
>     >
>     >
>     >
>     >
>     >
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