Hi Guenter,
I was able to replicate this here. What is happening is that when you click Snap/Grab in MAX we also display the acquired image on the VGA port on the CVS. For some reason the video driver on the CVS is reporting that the video mode we are trying to switch to is not valid. This seems to be a related to a combination of resolution and color format. To compound the problem, for some reason this is being reported as a fatal error.
For the time being, the easy workaround is to go to the remote image options configuration in MAX (Tools->NI Vision->Remote Image Options...) and turn off the option to "Display images on remote monitor." You'll still see images in MAX and you can still use the CVS's VGA port from within LabVIEW and Vision Builder AI (both have you select the video mode instead of trying to choose one automatically like MAX is doing).
Sorry you ran into this, but I've opened an issue for this item and hopefully it should be fixed in an upcoming release.
Eric