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Can you post your setup.cmd and also protocol.ini ?The error does not sound as if this is HW or driver related. It rather sounds like TCP/IP not being set up correctly.By the way: you might also consider applying the patch to the NDIS driver:https://www.os2site.com/sw/drivers/network/3com/3c589patch.zipThat might not strictly be necessary on your system but it surely won't hurt either. In addition, it will make the "3net_log.exe" utility work.Finally, look here, it is about Warp 4 but since you are using Warp 3, it might apply nonetheless:https://www.os2world.com/olderforum/OS2World%20Ultraboard/www.os2world.com/cgi-bin/ultraboard/UltraBoardea6e.html?action=Print&BID=62&TID=1518&SID=