[Kapi]

Hi Max,

One of the reason for the blue question mark could be that you have not defined the full property of material.
To choose new Material from the data bank use this code.

#Material Selection
#Accesing the Engineering data and modifying the Material
engineeringData1 = system1.GetContainer(ComponentName="Engineering Data")
matl1 = engineeringData1.GetMaterial(Name="Structural Steel")
matl1.Delete()
favorites1 = EngData.LoadFavoriteItems()
library2 = EngData.OpenLibrary(
Name="General Materials",
Source="General_Materials.xml")
matl2 = engineeringData1.ImportMaterial(
Name="Aluminum Alloy",
Source="General_Materials.xml") 
#End of Material Selection

see if you are getting same problem if you change your material!

Cheers
KAPI