CASE _ 1: printf does not print to Serial port.

while (1)                      // Start the Basic 100ms scan loop
         {
          if (F_ScanMain)
            {
              F_ScanMain = 0;  // Reset the looping flag which is set in interrupt.
              Pulse = ~Pulse;  // Heart beat pulse in run mode..
              if  (OneSecTik)
	{
	   OneSecTik = 0;      
	   ReadTime();         // Update Clock display once every sec
	   sprintf( string, "  %02u %02u %02u Hrs", hour,minute, second ); 
	   display(string);    // Update time in LCD
                   EA = 0;                                   // Disable interrupts
                   measurement =  Result[i] * 2430 / 4095;
                   printf(  "AIN0.%bu voltage: %ld \n", i,measurement); // Print mV value to RS232
                   EA = 1;     // Re-enable interrupts    	
                  }   			 
              }               // F_ScanMain closing brace.
       }                      // while(1) closing brace 

================================================================

CASE_2 : printf prints fine to Serial port.

 while (1)
        {
            EA = 0;            // Disable interrupts
            measurement =  Result[i] * 2430 / 4095;
            printf(  "AIN0.%bu voltage: %ld \n",  i,measurement);// Print mV value to RS232
            EA = 1;            // Re-enable interrupts
            Wait_MS(SampleDelay); // Wait before displaying new values
        }
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