ERROR: #869 : could not set locale "" to allow processing of multibyte charactor

 ERROR: #869 : could not set locale "" to allow processing of multibyte charactor

#include<lpc23xx.h>

int main(void)
{

PINSEL3 = 0x00000020; /* Slect PWM1.1 */

PWM1PR = 0x00002EE0; /* Prescaler to 12000 and timer run at 12MHz*/

........

........
}

I wrote this code for PWM genration.
This is running well on Windows Xp system.
I am using LPC 2378 microcontroller based board
I show output PWM wave in CRO @Pin 46
But show error>
ERROR: #869 : could not set locale "" to allow processing of multibyte charactor
on window Vista.