Build failed while export makefile button is clicked

i was trying out the pwm wave generation program for P16F877A using MPLAB IDE V.7.60 ...when i pressed the make file and build file button, it said BUILD SUCCEEDED...but when i pressed the export makefile button, it showed the following text as error in the output box..

Make: The target "E:\mplab pgms\PWM.o" is out of date.
Executing: "C:\Program Files\Microchip\MPASM Suite\MPAsmWin.exe" /q /p16F877A "PWM.asm" /l"PWM.lst" /e"PWM.err"
Warning[205] E:\MPLAB PGMS\PWM.ASM 1 : Found directive in column 1. (LIST)
Warning[208] E:\MPLAB PGMS\PWM.ASM 3 : Label truncated at 32 characters. (_CONFIG_WDT_OFF_HS_OSC_PWRTE_ON_CP_OFF)
Warning[205] E:\MPLAB PGMS\PWM.ASM 5 : Found directive in column 1. (ORG)
Warning[203] E:\MPLAB PGMS\PWM.ASM 6 : Found opcode in column 1. (GOTO)
Warning[205] E:\MPLAB PGMS\PWM.ASM 8 : Found directive in column 1. (ORG)
Warning[205] E:\MPLAB PGMS\PWM.ASM 10 : Found directive in column 1. (BANKSEL)
Warning[203] E:\MPLAB PGMS\PWM.ASM 11 : Found opcode in column 1. (CLRF)
Warning[205] E:\MPLAB PGMS\PWM.ASM 12 : Found directive in column 1. (BANKSEL)
Warning[203] E:\MPLAB PGMS\PWM.ASM 13 : Found opcode in column 1. (CLRF)
Warning[205] E:\MPLAB PGMS\PWM.ASM 14 : Found directive in column 1. (BANKSEL)
Warning[203] E:\MPLAB PGMS\PWM.ASM 15 : Found opcode in column 1. (MOVLW)
Warning[203] E:\MPLAB PGMS\PWM.ASM 16 : Found opcode in column 1. (MOVWF)
Message[302] E:\MPLAB PGMS\PWM.ASM 16 : Register in operand not in bank 0. Ensure that bank bits are correct.
Warning[205] E:\MPLAB PGMS\PWM.ASM 17 : Found directive in column 1. (BANKSEL)
Warning[203] E:\MPLAB PGMS\PWM.ASM 18 : Found opcode in column 1. (MOVLW)
Warning[203] E:\MPLAB PGMS\PWM.ASM 19 : Found opcode in column 1. (MOVWF)
Warning[205] E:\MPLAB PGMS\PWM.ASM 20 : Found directive in column 1. (BANKSEL)
Warning[203] E:\MPLAB PGMS\PWM.ASM 21 : Found opcode in column 1. (MOVLW)
Warning[203] E:\MPLAB PGMS\PWM.ASM 22 : Found opcode in column 1. (MOVWF)
Warning[205] E:\MPLAB PGMS\PWM.ASM 23 : Found directive in column 1. (BANKSEL)
Warning[203] E:\MPLAB PGMS\PWM.ASM 24 : Found opcode in column 1. (MOVLW)
Warning[203] E:\MPLAB PGMS\PWM.ASM 25 : Found opcode in column 1. (MOVWF)
Warning[205] E:\MPLAB PGMS\PWM.ASM 26 : Found directive in column 1. (BANKSEL)
Warning[203] E:\MPLAB PGMS\PWM.ASM 28 : Found opcode in column 1. (BTFSS)
Warning[203] E:\MPLAB PGMS\PWM.ASM 29 : Found opcode in column 1. (GOTO)
Warning[203] E:\MPLAB PGMS\PWM.ASM 30 : Found opcode in column 1. (BCF)
Warning[203] E:\MPLAB PGMS\PWM.ASM 31 : Found opcode in column 1. (GOTO)
Warning[205] E:\MPLAB PGMS\PWM.ASM 32 : Found directive in column 1. (END)
Error: Bad magic number in COFF file "E:\mplab pgms\PWM.cod".
A language-plugin exception occurred and was logged.
BUILD FAILED: Tue May 05 16:22:00 2009



please help me out

Why do you need to export a makefile?
You just need to press the make or build button and it will assemble the code and generate a Hex file for programming.
A makefile is usually used with command line assembling.

Sounds like your cut and paste didn't preserve the formatting.