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So , it does work now

I have resolved my issue

The problem was a bug from Isis

You can close the topic if you want

Thank you for your help Very Happy

Thank PCM Programmer
I begin to wonder if the problem does not come from Isis which doesn't support external interruption.
There is no reason for not working here.
I will try to run your program o ...

So the compiler version number is 4.038

What happens if you reduce the program to just blinking the LED?#include <16F88.h>
#fuses INTRC_IO,NOWDT,BROWNOUT,PUT,NOLVP

#use delay(internal=8M)

void main()
{
...

well I try with your code

#include <16F88.h>
#fuses INTRC_IO,NOWDT,BROWNOUT,PUT,NOLVP

#use delay(internal=8M)

#INT_EXT
void ext_isr(void)
{
output_toggle&# ...

Thanks for your responses
I haven't a pull-up resistor on the External interrupt pin but a pull-down as I trig interruption from Low to high voltage (ext_int_edge(L_TO_H); )

...

if you look my code I put enable_interrupts(GLOBAL)

Hello:grin:

I post a new topic because I trying to validate my external interrupt program.

I have a function when my button RB0(INT0) to press that my LED (on RB1) can work.
It's a simple prog ...