need help: unresolved external masm 5.1

[cute_6423]

---

programming masters, i need your expertise..please, help!

i have to link A.asm to B.asm (which is the main)

A.asm is already public and far, and i already put the command "EXTRN A:far"

still, i get the error "unresolved external"

i googled it, but wa jud ko nakit-an..

im desperate to know what's wrong, pls help me

thanks

[MarkCuering]

paste your precious code.

[cute_6423]

include macros.txt
extrn act2: far, act3: far, act4: far, act5: far, act6: far, act7: far, act8:far,act9:far

.model small
.stack
.data
string1 db "****^^^MENU^^^****$"
strAct2 db "Activity 2: [1]$"
strAct3 db "Activity 3: [2]$"
strAct4 db "Activity 4: [3]$"
strAct5 db "Activity 5: [4]$"
strAct6 db "Activity 6: [5]$"
strAct7 db "Activity 7: [6]$"
strAct8 db "Activity 8: [7]$"
strAct9 db "Activity 9: [8]$"
strExit db "Exit : [9]$"
strThanks db "*** Thank You and Have A Good Time ***$"

stringInput db "Select activity to run: $"



.code
act10 proc far

initialize
mov es, ax
clearScreen

start:
; *************DESIGN PHASE*******************
;
;coloredClearScr macro color, uLeftRow, uLeftCol, lRightRow, lRightCol
; For the Heading Title
coloredClearScr 0CEh, 2, 6, 6, 70
coloredClearScr 3Eh, 3, 5,5, 71

; For the string Title
setCursor 4, 29
displayText string1

; For the Text to display all activities

coloredClearScr 47h, 8, 6, 18, 70
coloredClearScr 0Eh, 9, 7, 17, 69
setCursor 9, 17
displayText strAct2
setCursor 10, 17
displayText strAct3
setCursor 11,17
displayText strAct4
setCursor 12, 17
displayText strAct5
setCursor 9, 42
displayText strAct6
setCursor 10, 42
displayText strAct7
setCursor 11, 42
displayText strAct8
setCursor 12 ,42
displayText strAct9
setCursor 14, 32
displayText strExit
setCursor 16, 17
displayText stringInput
setCursor 16, 25

;*********INPUTTING AND OUTPUTTING PHASE************

setCursor 16, 40
mov ah, 1
int 21h

cmp al, 31h
clearScreen
je call1

cmp al, 32h
je call2

cmp al, 33h
je call3

cmp al, 34h
je call4

cmp al, 35h
je call5

cmp al, 36h
je call6

cmp al, 37h
je call7

cmp al, 38h
je call8

cmp al, 39h
je call9

call1:
call act2
clearScreen
jmp start

call2:
call act3
;jne toEnd
jmp start

call3:
call act4
jmp start

call4:
call act5
jmp start
call5:
call act6
jmp start
call6:
call act7
jmp start
call7:
call act8
jmp start
call8:
call act9
jmp start
call9:


setCursor 24, 0
exit

act10 endp

end act10

[MarkCuering]

please use code wrapper

what assembler you are using?
how you execute your linker command? do you have to include libraries?

eg: ml file1.asm file2.asm io.lib

Some assembler suggested to declare their variable under FAR Segments ".FARDATA" (file 1) and use EXTRN directive within the scope of DATA directive in file 2, then followed by your procedure.

by the way, is your assembler can check sysmbols being declared (EXTRN) outside any segment? coz if not, there are possibility that File 1 will not return the correct segment..

here's some sort of solution for that:

        .DATA
        .

        @CurSeg ENDS                    ; Close segment
        EXTRN    var:BYTE
        .CODE
        .
        add procedure moving your variable to data segment.

try to study also the use of GLOBAL and PUBLIC.

[MarkCuering]

oh sorry, so its masm5.1

try here: Microsoft MASM Programmer's Guide: Assembly-Language Development System v6.1 - Chapter 8 search on "Positioning External Declarations" read until "Using Alternatives to Include Files"

[cute_6423]

^^thanks sir..sori abour the code wrapper, actually i dont know how to use it..i'm a super noob

[MarkCuering]

Did you manage to run your code?