Hi all, After compiling, I got following warning: *** WARNING L15: MULTIPLE CALL TO FUNCTION NAME: _PUTMULTICHAR_SCI/SCI CALLER1: ?C_C51STARTUP CALLER2: INT0_ISR/INTERRUPT Int0_ISR() is in interrupt.c. However, I believe that function PutMultiChar_SCI() is not called by Int0_ISR(), although it was. PutMultiChar_SCI() is called at multiply place within main loop. I read http://www.keil.com/support/docs/805.htm I was wondering is there any cause will generate this warning ? Thanks in advance. Daniel