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Multiple Atmel CC03's: CAN Buffer overflow?

Hello,

I'm just starting to use the Atmel AT89C51CC03, but now I encouter a problem I can not solve...

I have build a prototype board with multiple controllers on it. They all send a message to the 'host' (also an Atmel) when there is a change in one of their inputs.
The host controller outputs the collect data out in a string (via the UART).
With the Canalyzer (Vector) I see all messages are send, but when the message count increases, the host-controlller, misses some messages, because it only shows the 'old' data.

Maybe it is some kind of overflow?
I have used the examples 'cangen' and 'canmon' to get the CAN-communications working, but I thinkg I have to search the solution in using all 'channels'.

Does anyone encounterd this problem?

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