Ted,

>When an SQL server column is nullable how do I set/update the entity column value to null?

In the upcoming MM .ENT 2.3 We have changed nullable entity properties so this works properly. Here's an example of the new code:

this.Row["OrderDate"] = mmType.SetNullableDbValue(value);

mmType.SetNullableDbValue is a new method that looks like this:

public static object SetNullableDbValue(object value)
{
	return (value == null) ? DBNull.Value : value;
}

For now, you can just change the Set() of the entity property to use similar logic as the SetNullableDbValue() method, or you can send me a private e-mail and I will get you a pre-release of the new version.

Best Regards,