xdata declaration result in uncertain output

but now when i want to add some code it give's the error as

How about posting the code ?

Have you read the error description and understood what causes the error ? You're trying to use more of a certain memory type than there is available.

so i used xdata this solved the problem at the software end

Have you understood all the implications this "using xdata", and what this means for your program ? I.e. memory maps, or the need to activate the internal xdata memory of your chip first, or the slower access times of variables in xdata memory ?

"new" - 0 Error(s), 0 Warning(s).
but when i used it in hard ware it disturb the display.

Without knowing more about the code, any attempt at diagnosing the problem is pure guesswork.

but now when i want to add some code it give's the error as

How about posting the code ?

Have you read the error description and understood what causes the error ? You're trying to use more of a certain memory type than there is available.

so i used xdata this solved the problem at the software end

Have you understood all the implications this "using xdata", and what this means for your program ? I.e. memory maps, or the need to activate the internal xdata memory of your chip first, or the slower access times of variables in xdata memory ?

"new" - 0 Error(s), 0 Warning(s).
but when i used it in hard ware it disturb the display.

Without knowing more about the code, any attempt at diagnosing the problem is pure guesswork.

as the internal RAM is full so using by XDATA i am trying to use the internal XDATA memory.

Does your particular chip have internal XDATA?

Does it need to be enabled and/or configured? If so, have you done that?

Remember, just checking the 'Use XDATA' box in uVision is simply for the information of the tools - it does not do anything to configure the target hardware.