9 times out of 10, my program awakes fine (IOC interrupt related), but....

[HankMcSpank]

Thanks bert :-)

Ok, I've removed all the gosubs from the interrupt routine, but I'm still getting erratic results...I kinda know what's not causing my PIC to go to sleep , but the workaround is ugly.

I think I'm hitting diffs with nested gosubs. Imagine this scenario (this is just high evel *not* my actual code - just to get my problem across)...

loop1:
if pattern = 2 then goto loop2
IF sleep_flag = 1 THEN GOTO SLEEP_ROUTINE
pause 10
gosub decrease duty
gosub select_LED1
pause 10
gosub increase_duty
goto loop1:
'
loop2:
if pattern = 1 then goto loop1
IF sleep_flag = 1 THEN GOTO SLEEP_ROUTINE
pause 10
gosub decrease duty
gosub select_LED2
pause 10
gosub increase_duty
goto loop2
'
SLEEP_ROUTINE:
debug "PIC off to sleep",13,10
pause 200
@sleep

' program continues here afteran IOC interrupt....
pause 100
debug "PIC awake",13,10

IOC_Int:
@ INT_DISABLE  IOC_INT

if sleep_flag = 1 then ' if we wake from asleep, this flag will be set still need to clear it & retun to the main program
sleep_flag = 0
goto INTERRUPT_END
endif

LOOP3:
        IF SW1 = 0 THEN 
        COUNT3 = COUNT3+1
        IF COUNT3 >300 THEN      'if Sw1 held for 300mS then set sleep_flag
        SLEEP_FLAG =1 
        goto INTERRUPT_END
        ENDIF
        pause 1 
        GOTO LOOP3
        ENDIF

if pattern <2 then    pattern=pattern+1  'cycle between pattern1 & pattern 2
else
pattern=1
endif

INTERRUPT_END:
COUNT3 =0  
while sw1=0
wend
PAUSE 180 
IOCAF = 0         'CLEAR THE INTERRUPT FLAG
@ INT_ENABLE  IOC_INT
'**************
@ INT_RETURN

It seems the interrupt routine (or program!) doesn't like the highlighted Gosubs in the loop1 & loop2 - if I remove the gosubs & instead locate the actual code contents of the gosubs in each loop - then everything is dandy (i.e. the PIC always goes to sleep & awakes fine) , but if I have gosubs in those two main loops - it looks like the interrupt routine (or some other aspect of my program) doesn't return to the main two loops & then trap the sleep_flag being hit! (the problem here is that by not using gosubs I run out of program space *very* quickly!)

What am I missing here?