about "a C program calling an assembly routine"problem

The C code is:

#pragma SRC
#include<Reg936.h>
#define uchar unsigned char
#define uint unsigned int
extern uchar AA1;
extern uchar a_func(uchar)
void main()
 {
  unsigned char ab,acd;
  AA1=0xff;
 P0M1=0xff;
 P0M2=0xff;
        ab=1;
        acd=128;
 while(1)
   {
     if(ab==128)
      {
           P0=~acd;
           ab=128;
           acd/=2;
    a_func(acd);
          }
         if(acd==128)
         {
          P0=~ab;
          acd=128;
          ab*=2;
   a_func(ab/2);
          }
         if((ab==128)&&(acd==1))
          {
          ab=1;
          acd=128;
         }
        }
}

when i press the "build target",and disappear the error:

C51 FATAL-ERROR -
  ACTION:  PARSING INVOKE-/#PRAGMA-LINE
  LINE:    #pragma SRC
  ERROR:   RESPECIFIED OR CONFLICTING CONTROL

how to deal with the error?