How can access the system type of a duct fitting

How can access the parameter of a duct fitting. I got an error. don’t know what is wrong.

d to f.dyn (15.3 KB)

after the node GetParameter… … take another GetParameter… with “Type Name” parameter name

The error is probably caused by the ‘Undefined’ system type. If you expand the results of your ‘e.Name’ node then you should still see the name of every system type expect for the ‘Undefined’ type.

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