Hi everyone!
I’m a beginner in Dynamo an I’m trying to compare a list of door parameters extracted from Revit with a list of allowed values coming from Excel. Both inputs are structured as lists of lists: each door is a sublist of parameters, and each Excel sublist contains all valid options for that specific parameter index. My goal is simply to check, for each door, whether each parameter value exists in the corresponding Excel sublist at the same index, and return a list of boolean results for all doors. The difficulty is that many native Dynamo nodes don’t reliably align parameter index with the matching Excel sublist when working with nested lists, often comparing the wrong level or the entire Excel structure instead of the sublist. Below is the stage where I stopped:
If anyone knows a node setup or pattern to achieve this alignment and comparison, I would really appreciate some guidance. Thanks!

