If I open a xls file with the following options:

PropertyValue[] propertyValues = new PropertyValue[1];
propertyValues[0] = new PropertyValue();
propertyValues[0].Name = "Hidden";
propertyValues[0].Value = true;
xComponent = xComponentLoader.loadComponentFromURL(getUrl(xlsFile), "_blank", 0, propertyValues);

And print it after that by the following code:

XPrintable xPrint = (XPrintable) UnoRuntime.queryInterface(XPrintable.class, xComponent);
PropertyValue[] printProperties = new PropertyValue[1];

printProperties[0] = new PropertyValue();
printProperties[0].Name = "Wait";
printProperties[0].Value = true;
xPrint.print(printProperties);

The print wont happen! Somehow it isnt possible to print xls-Files from an invisible Window. Ods, odt and doc are working.
I can just print xls, when the window is visible: (before the print

XModel2 model = (XModel2) UnoRuntime.queryInterface(XModel2.class, xComponent);
model.getCurrentController().getFrame().getContainerWindow().setVisible(true);
model.getCurrentController().getFrame().getContainerWindow().setVisible(true);