>        All other products (maybe 6 or so) have moved over fine. All of
them
>have USART code running at 250 kbps. The 18x452s are running with a 10
>MHz ceramic resonator with the PLL giving a processor speed of 40 MHz.


Thank you Harold, I am more quiet now.
Did you emulate your 18F452 code with an ICE?

Regards,
Carlos

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