Generally speaking, the QuickTime player is not completely installed on many computers, because the existing part is already enough to view the quicktime files. But for Modelweaver, you should have the QuickTime Player installed completely.
Please do as follows to make sure you have quicktime installed completely. In one of the steps of the installation, you have to choose one installation type from three options, they are "minimun, recommended and custom", you have to choose "custom.
In the following step, you need to select components, please choose "select all", the component "quicktime for java" must be selected, otherwise you can not save the object movie as quicktime files.
Now the QTVR export is working.
But it does not autorotate. Is there a possability to add a autorotate sprite to a existing QTVR Movie?