When i try to open a simple model in the Preview App, it des not open it.
Instead it still shows the previously opened workspace, but also does not give an error message.
Can someone help or tell me where to look for the issue?
Hi @michael-tinted-queue, for a workspace to be opened with the preview app additional files beside the models are required. These files exist in the example workspaces that come with the installer. Therefore to check your own models it is advised to either create a new workspace by clicking the “New Workspace”-Button on the Preview App Control or to copy an example workspace and include your own models in the models folder of either of these workspace. This way you have the required files to run the workspace and your own models in a working workspace.
Yep, thx, this worked 
However, it would be helpful to get a feedback from the system, why a workspace can not be opened
(eg. "Could not open, missing file ‘workspace.json’ ").
Could you forward this as a feature request?
Hey @michael-tinted-queue, thank you for the feedback and indeed more information would be helpfull. I will forward the feedback to the responsible people.