I added a column in the abacus (costs) where I entered the values manually but these unlike the others (es: volume) are not recognized!!
Please upload a screenshot where you can actually see which nodes you’re using… And also enable all previews 
(You can zoom into a single node and use the camera icon in the top right corner to capture your screenshot…)
You could try and use the “object.type” to verify your data types, but I do not think that is the case as of yet.
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Try using “Element.Parameters” to explore which parameters are callable…
Also do upload a screenshot where you have enabled the previews (so that we can see the information flow).
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You have still not enabled the previews…
Also, please show the revit elements in Revit showing the desired parameter…
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“Costo totale” does not seem to contain any information…
Could you… like I asked in last post… add the pictures of your Revit file showing that the parameter has a value that you’ve added…
Alternatively you should upload both your “.rvt” AND your “.dyn” file to the post…
Currently that’s not much we can do for you… (Also a reply every now and then would go a long way instead of just changing the original post…)
I’ll need to get the .rvt and .dyn files…
This looks like a schedule and not a element parameter fyi
You’re pulling information from your walls mind you, not from your schedules…
the revit file is very heavy
I simply inserted the cost column where I attributed the unit costs from which then I obtained the total cost with a function
So you’re working in the schedule not the elements from which you try and query the information in dynamo…