[Closed] Render effect update prob

I`ve written a couple of render effect plugins.

They work fine, exept occationally max refuse to update them
or show me the original. Once I press either button max start
rerendering the image.

This happens very seldom, but it is still very annoying.

I cant think of anything in my scripts that could cause this
behavior and I wonder if this is a bug in max.

Anyone ?