Hi Tanja,
It looks like we need to improve DIAdem's documentation. The errors you're getting are by design-- a VBScript is not permitted to create a property of type enumeration or unknown. DIAdem itself creates a few properties of type enumeration, so you'll run into those, but you can't create them. The unknown data type is just there for the case that DIAdem reads a property from a file but can't determine its data type from the info in the file (remember DIAdem reads hundreds of different file formats, many of them ASCII formats that aren't super-reliable). No property is supposed to exist with the data type unknown, so DIAdem won't let you create one that way.
I understand the interest in creating an enumeration property, but it is simply not implemented at the moment for a user to crate enumerated properties. You can create enumerated variables with the old VAS file approach, but I personally find that approach more trouble than the enumeration variable is worth, and there is no way to turn such an enumerated variable into a File/Group/Channel property, so that doesn't help you with your goal. I'm afraid you either have to create an integer property or a string property (or both) as an alternative way to store the information you'd prefer to save as an enumeration property.
Brad Turpin
DIAdem Product Support Engineer
National Instruments
