This command sets the maximal number <nk> of data sets KUPLOT can read simultaneously. The value of "data sets"*"data points" is constant and can be adjusted by recompiling KUPLOT. The command must be executed before the first data set is loaded.
For 2D files there is another limitation. For those files the value of "points x"*"points y" must be less or equal to the displayed max. number of data points. Furthermore the first loaded data set determines the maximal allowed number of data points in x and y direction.