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Their in an error C267 : 'LCD Delay1': require ANSI - style prototype... It is the combination of LCD and GSM coding in keil software.
LCD_Delay 1(100);
Please read the manual: http://www.keil.com/support/man/docs/c51/c51_c267.htm
You do know what a "prototype" is in the context of 'C' functions - don't you?
If not, look it up in your 'C' text book.
Here are some 'C' learning & reference materials for you - including a free online 'C' textbook: blog.antronics.co.uk/.../