“+CME ERROR: unknown network message” error while sending AT USSD command

I am trying to execute USSD codes through my GSM modem. When i try USSD command which gives me some options, it is executed but i can't get any operation done from the options. AT+CMGF=1 OK AT+CSCS...
“+CME ERROR: unknown network message” error while sending AT USSD command

I am trying to execute USSD codes through my GSM modem. When i try USSD command which gives me some options, it is executed but i can't get any operation done from the options. AT+CMGF=1 OK AT+CSCS...
when i compile ,i get a message ERROR: UNKNOWN RECORD TYPE 60H

I AM NEW TO THIS FORUM AND TO KEIL TOO,I AM WRITTEN SOME ROUTINES FOR LCD AND KEYPAD,I AM USING 89C51RD2 FROM PHILIPS,WHEN I COMPILE THE FILES I GET A MESSAGE AS UNKNOWN RECORD TYPE 60H AND OHS51 ABORTED...
when i compile ,i get a message ERROR: UNKNOWN RECORD TYPE 60H

I AM NEW TO THIS FORUM AND TO KEIL TOO,I AM WRITTEN SOME ROUTINES FOR LCD AND KEYPAD,I AM USING 89C51RD2 FROM PHILIPS,WHEN I COMPILE THE FILES I GET A MESSAGE AS UNKNOWN RECORD TYPE 60H AND OHS51 ABORTED...
C166 preprocessor directive #message unknown

I want to use the preprocessor directive #WARNING. But I get always an error. Example: #message "This is my own message" Compile error: error 315: unknown #directive 'message' I use the...