This is not specific to file type.

If I open the app and load 2 images then register, it's fine.

Straight after if I reload 2 different images and then try to register it doesn't work.

I have this when I run from #87 with vtk8.1.2 and viewer current master

when we load new images we should run the functionality that "New session" has

When I manually register the "Translate Z" widget does not update and it is stuck to 0. Is this the problem you mention above or something different?

Do you mean just the widget but it allows you to move the images relative to each other?

In my case I could not move the images relative to each other at all, but this only happened if I had loaded an image/different images multiple times int he same session

Do you mean just the widget but it allows you to move the images relative to each other?

In my case I could not move the images relative to each other at all, but this only happened if I had loaded an image/different images multiple times int he same session

Yes, I mean the widget to move the images relative to each other. However I do not know if the shift in the z direction is recorded and passed to the core code correctly. I will check that and open a new issue about it.

Did this only happen if you reloaded different images in the same session?

No, I checked it and it does it all the time for the images I tried.

Did we conclude that you did not have a problem with translation on Z in the end?

Yes, I understood what my concern was and it is not a bug. We just need to clarify that by using the mouse one can sweep the volume in the third direction, this is not a translation. This will be addressed in issue #209

The problem seems to be that when we reload new data the observers no longer work