Hi Vijay,
You are correct in-terms of Activation of IO and I did Activation of "0MATERIAL" as I have found in the modelling.
If IO Characteristic Catalogue is missing, it should be in the "Unassigned Nodes" --> "Unassigned Characteristics". I cannot find here also.
What could be reason and how to get it into its respective "Char Catalogue" as Object is already active?
Thanks,
Srinivas