All my TCP examples and applications work, and I'm calling sys_check_timeouts(); so, if tcp_tmr is really not called, then "something" with the same functionality is being called. I do use NO_SYS=1 and have provided a working sys_now() function. DHCP and DNS timeouts are also handled through sys_check_timeouts(), and I have used a timeout for a UDP application as I sent. As this seems to work for any similar scenario, what is actually your problem ?
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