[marccenter]

Andrew,
When a VEX microcontroller goes down I have generally found that
1) Student programming error is major cause (> 80%)
2) Student programming with low battery may be potential cause. A firmware
reload appears to fix this "anedotal" problem. ( < 10%)
3) VEX microcontroller hardware error is very small percentage of the cause
(1 unit from all of our OCCRA units so far < 30 units).

This year OCCRA is using VEXnet. We are using the older style VEX transmitters upgraded with VEXnet hardware. Some competitions are using newer style VEX transmitters that are different from our units.
Our VEXnet transmitters and receivers have received a firmware update from IFI. We need to experiment with them a little more before we jump to any conclusions about their behavior.