first of all thank you very much for the immediate reply..

as for mackrackit: yes i am using MPASM as my assembler but why do i still get this same error?

as for darrel taylor thank you for suggesting on not using 'F84s anymore but you see i don't have any available PICs beside the PIC16F84A and i haven't mastered yet PICBasic Pro language yet..
Code:
LED1   VAR  PORTB.1

INCLUDE "DT_INTS-14.bas"     ' Base Interrupt System
INCLUDE "ReEnterPBP.bas"     ' Include if using PBP interrupts

ASM
INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler    INT_INT,  _ToggleLED1,   PBP,  yes
    endm
    INT_CREATE               ; Creates the interrupt processor

    INT_ENABLE   INT_INT     ; enable external (INT) interrupts
ENDASM

Main:
  PAUSE 1
GOTO Main

'---[INT - interrupt handler]---------------------------------------------------
ToggleLED1:
     TOGGLE LED1
@ INT_RETURN
this is your example that i was trying to compile using microcode studio..
pardon me for the inconvenience..

i think that your code is the best way to service interrupts in picbasic environment which i can very much use for my led dot matrix(5x7) scrolling display..

thank you very much!!