Background
The visibility of fields on a custom property page can be configured to be dependent on a VBScript expression as described in Configuring the display conditions of a panel element. When you attempt to save the configuration, the system validates the expression first. If the expression is invalid, an error appears that states You are about to save the following script...which cannot be validated at this time. Do you want to continue.
Description
On Windows 7 and Windows 2008R2 computers, the Unknown error message appears instead. There is no known workaround and due to the age of the affected operating systems, we do not expect to resolve this issue in a future release.
