After the viflow 6 process model has been successfully exported to a WebModel, individual process graphics are not displayed.
Only one white page appears in the WebModel.
This is caused by a Visio setting that prevents the export to the SVG graphics format.
Open the affected process in viflow and right-click on the tab below the process graphic. Then select "Page Setup".
In the new window, switch to the "Page Properties" tab and check the Type setting.
This must be set to "Foreground" and is usually set to "Background" when the error occurs.
After switching to "Foreground", the process can be displayed again in the WebModel after a new export.