Hi Migel, Thank you for your answer. In my case, in order to understand what is happening, I am using only one level of depth, and I need to split around 10000 records into 10 groups by only one categorical (nominal) variable. The frequencies add up but not all of the categorical levels are included in the if-then clauses in the SAS Node Rules. I have been trying this for several different categorical variables, and I always have few missing levels. Since they are not interval variables, nor ordinal, they have to be grouped by target predicting probabilities. I am using Sample=None option and I tried with and without partitioning, and I always have missing levels. I think I may have to set some number of levels variable to use all of the levels somewhere. I have only 70 levels for this example. When creating the data, I did the customiztion and set Class Levels Count Threshold to 100, but it did not help.
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