Can connect when Scan but cannot download program

[mvallance]

Hi. I have a problem downloading programs created in Mindstorms to my NXT robot.
I updated firmware successfully to v1.3.
I used Scan and my NXT brick is shown as connected (USB) with battery life and firmware info.
But I tried to download a program and cannot.
I tried Calibrate sensors too and NXT brick error shows not connected -- when in fact it is.
I am using Mindstorms 2.1 on Mac OSX Snow Leopard with latest updates.
Any help appreciated.
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Also, is there an image of the NXT interface available that explains what each icon is. The one that is odd to me is the one to the left of the battery level indicator. Is it some download in progress as it keeps spinning clockwise? Thanks.

Michael

[mattallen37]

Sounds like a driver issue. Being a Mac, I can't offer any specific help.

[afanofosc]

Also, is there an image of the NXT interface available that explains what each icon is. The one that is odd to me is the one to the left of the battery level indicator. Is it some download in progress as it keeps spinning clockwise? Thanks.

The icon you refer to is just a visual indicator that the NXT virtual machine is "running". It is normal for it to be spinning like you describe.

I am not sure why you would be unable to download programs to the NXT other than being low on free space, which should not be the case if you have just flashed the firmware to the brick. Another cause for download failures can be that the remaining space is fragmented to the point where no contiguous block of flash memory is large enough for your program to fit in. That also should never be the case if you have just reflashed the firmware image. But if you have subsequently downloaded a bunch of sound files or picture (ric) files or saved a lot of datalog files on the brick then perhaps you have run out of space.

John Hansen