I have made a configuration on "Register Activation" class but attribute index data 3 is not visible on GxDLMS Director. Instead of data it is showing following system Generic list as
System.Collections.Generic.List'1[System.Collections.Generic.
KeyValue2[System.Byte[].System.Byte[]]]
System.Collections.Generic.List'1[System.Collections.Generic.
KeyValue2[System.Byte[].System.Byte[]]]
Tariff log of all attribute index are (rest attribute index data is visible on GxDLMSDirector screen) as 1