Hi,

Hope the text is not too long.

I am trying to do the following.

-obtain all family parameters that are associated with all elements in my revit model

-(my model has 231 elements)

-(a total of 64 parameters are associated with these elements)

-now i want to obtain the parameter values of all 64 parameters of all elements. this results in a list of 231 sublists of 64 values

-now i want to filter out only the unique combinations of these 64 values, by list.unique.items. This results in a list with 171 sublists with unique combinations of 64 parameters.

-furthermore i have created a list with numbers 1-171 (based on the number of unique parameter value combinations)

now, the missing link to what i am trying to do:

-i want to assign a number 1-171 to each element based on its combination of parameter values.

-there are 171 unique parameter value combinations, so elements which have exactly the same values should get the same number 1-171

-i have created a project parameter called ‘Unique Number’ for this

**I dont see how to do this** I dont see how to [step 1] select the elements by their unique parameter value sets and [step 2] assigning the numbers 1-171 to them.

-I know i can do step [2] with Element.SetParameterByName node.

-But how can i do step [1], in a smart way ? And how to combine the two operations in the right way, with regards to lacing / hierarchy /

Can you give my a hint for this? Many thanks in advance! Ill attach revit project + .dyn file.