CC3235MODSF: AT Commands error codes description

I am using LAUNCH_CC3235SF board and downloaded example project of AT Commands. It does get downloaded and I can see Application banner on serial terminal. However, when I give AT commands, most of them are replied with some error message e.g. ERROR: process command,-2050 for AT+WlanConnect=ssid,,securitytype,securitykey,,, command.  With the given error codes It is not clear what exactly is the problem. I am referring document SWRU534D - SimpleLink Wifi AT Commands User guide. Can anyone please help with descriptions of these error codes?

Thanks,

Pradeep