A little DT_INT confusion.

[circuitpro]

It's a PIC18F2520.

I was going to run the risk of talking to myself, and add another short bit - I finally got smart, and put something in the main loop, so I could see if the uart interrupt handler ever returned from it's job, and found that it isn't!!

Everything just appears to stop after a uart interrupt. It does what it's suppose to, (reads from one port, and writes to the other) and never returns to the main loop.

I'm at a loss, and hoping that would be of some help.

'INITIALIZE INTERRUPTS
ASM
INT_LIST  MACRO       ;IntSource,Label,Type,ResetFlag?
        INT_Handler INT2_INT, _EXTTS,PBP,yes
        INT_Handler RX_INT, _RDRINT,PBP,yes                     
    ENDM
    INT_CREATE                               ;CREATES THE INTERRUPT PROCESSOR 
ENDASM

START:
GOSUB CLS
PAUSE 100
SEROUT2 DIAGOUT,MODE,["SDIF2 VER. 1",10,13]
 
'ENABLE INTERRUPTS
@ INT_ENABLE RX_INT                          ;READER UART INTERRUPT
@ INT_ENABLE INT2_INT                        ;EXTERNAL INTERRUPT

'======================
MAIN:
'======================
SEROUT2 DIAGOUT,MODE,["."]
FOR X=1 TO 100
     PAUSE 1
NEXT X
GOTO MAIN

'======================
RDRINT:                                      'TAG READER INTERRUPT! 
'======================                     
HSERIN [WAIT($02),STR TAG\8\$03]             'READ TAG FROM THIS PORT      (WORKS)         
SEROUT2 DIAGOUT,MODE,[STR TAG,10,13]         'SEND TAG DATA TO THIS PORT   (WORKS)                                                              
@ INT_RETURN                                 ; <=== THIS IS NOT RETURNING! (DOES NOT WORK)

''======================
EXTTS:
''======================
'SEND SPECIAL DATA NOW 
SEROUT2 DIAGOUT,MODE,["00995031",10,13]      '(WORKS)
@ INT_RETURN                                 ;(WORKS)