[gradsusr] Define error: Define not yet valid for station data

[Milos Lompar]

Hi. I am using station data files and want to plot some skew plot. In script for plotting is used define command for creating new vars. When I try to use that script grads report sais : Define error:  Define not yet valid for station data.
Does anybody know when it will be implemented or some other way to plot skew plot from decoded temp with grads?

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