I tried the same script in my friends computer it worked. but its showing this specTypeId. please anyone explain me what is this error. I am using Revit version 2023.
Hello @chandrajith.Ck and welcome to the forum 
, yes there was some issues with that in revit 2023 in the first build, try upgrade to the latest 23 version cant remember what the latest it but should help…you can take a look on this post here as well