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NDK 1.94 error troubleshooting on DM648

I am using NDK version 1.94 on a DM648 device.  I can link to a gigabit ethernet switch but when I use the send() command to transmit data, I get one of two error codes back:

Error Code 64 “HOST IS DOWN”

Error Code 65 “NO ROUTE TO HOST”

I was wondering if anyone could point me to something I could look at in either software or hardware that could help figure out why the DSP cannot send data to the host.  This same code works on the EVM.

Thanks,

Jason