Problem with InvertBit event

Hi guys,

For a simple example I want to use one pushbutton to change the bitvalue of a tag (M0.0, boolean).

When the bitvalue is 0  -> Red circle on de HMI panel flashes

When the Bitvalue is 1 ->  green circle flashes on the HMI panel

I assigned the invertbit command to the "press" event, and M0.0 to the tag of this event.

When I simulate this, it does not work. M0.0 stays 0 (red flashes)

When I use 2 pushbuttons, 1 for ON (setbit) and one for OFF (resetbit), the program works.

I have no idea what is going on, can anybody explain this to me? 

thank you

I assigned invertBit to the release event

Sorry for posting this in the wrong place

Simulation with tag simulator works! I'll keep this in mind for future projects.

thank you very much