hi all, In the telnet application of RL_TCPnet, i want to add a command of set password. When user input the new password, i hope the telnet server close ECHO feature, . So i set tnet_config.NoEcho = 1; in code. After set new password, open again by code tnet_config.NoEcho = 0; . Unlucky, after execute the code tnet_config.NoEcho = 1; , the telnet server crashed. Why?