Error when mixing Assembly and C using MPLAB 6.4

mixing Assembly and C

Hi, i'm trying to mix Assembler and C using MPLAB v6.40. (ie to get the assembler code to call a c function). The file.c source code is compiling as a standalone. So is the file.asm. The errors occur when I put them together on a project and try to compile the file.asm. I have read the MPLAB, C-18, MPASM, MPLINK user guides and still can't find what is wrong. any ideas? the file.c and file.asm code is listed below after the error I get:

C:\mcc18\example\getting_started\location\location.asm:2: unable to locate 'P18F452.INC'
error 1 spawning C:\mcc18\bin\cpp18

location.c
#include <p18f452.h>
#include <math.h>

char perform_x_averaging(char xtempregister1, char xtempregister2);

void main(void)
{

}
char perform_x_averaging(auto char xtempregister1, auto char xtempregister2)
{
return ((xtempregister1 + xtempregister2) / 2);
}

location.asm
LIST P=18F452, F=INHX32 ;directive to define processor
#include <P18F452.INC> ;processor specific variable definitions

EXTERN perform_x_averaging

Main
start

movlw 0x61
movwf POSTINC1
movlw 0x65
movwf POSTINC1
rcall perform_x_averaging

END ; directive 'end of program'

mixing Assembly and C

Sounds like it cant find the include file? Copy it into your working directory.

mixing Assembly and C

copy the include file as mentioned abpve and use the: #include "include_file.h"
syntax for convention.