I get the message "Invalid argument."

In the regional settings of Microsoft Windows Control Panel, your location is set to a region that uses a character other than a period (.) as a decimal separator. The settings for properties in data access pages require that the decimal separator be a period for all languages. Either change the region or set the decimal symbol to a period in Windows Control Panel regional settings.
The value you typed in the property sheet does not match the data type of the property. For example, the Width property of a section can be set to any number, but if you type a string such as Narrow, you will get the "Invalid argument" message.