Hello, We are using _at_ keyword to locate a variable at particular address. We declared the variable as per the description given in Help for the _at_ keyword. The declaration of variable we done is as follows: unsigned char xdata abc _at_ 0X0000; When we compiled with the above declaration our target was created with 0 errors and 0 warnings. But we want to locate the above variable at 0X8000. so we declared the variable as follows. unsigned char xdata abc _at_ 0X8000; but when we are compiling our program with above declaration we are getting lot of errors. one of the error we are getting is : ERROR L107: ADDRESS SPACE OVERFLOW. SPACE : XDATA we are having around 60K variables in whole program. but we want only one variable at the above address.