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Hi
I am trying to count the number of observations in a series that has missing values. I use the command seriesname.@obs, but every time I got a message that says that "NA found in matrix". I know that the series has missing data and that is why I want to count the available data point. Any help on how to solve this?

That is the correct way to do it.

Thanks for your reply. Yeah, I found out what is wrong, It works now.