The Vertical Space value must be a positive number greater than zero.

You have selected the Properties for an image and entered a value in the Vertical Space field that is not a positive integer greater than zero.

To correct this error

1. Open this HTML page for editing in Design view of the HTML Designer.
2. Right-click the image and select Properties from its context menu.
3. In the Vertical Space field, enter a positive integer greater than zero.