The Start Groups and End Groups nodes in SAS^® Enterprise Miner™ enable you to perform BY-group processing. However, if your group processing includes a Transform Variables node, scored results might be incorrect. The problem occurs when all of the following conditions are true:

• The Interval Inputs Optimal Binning property is selected.
• The OPT_<variable_name> variables that are created for each group have different LENGTH values for two or more groups.
• The largest LENGTH value is not the first LENGTH value.

The generated score code uses the LENGTH value from the first group when scoring all groups. When all conditions are met, there is at least one subsequent LENGTH value that is longer, and the values of the scored data are incorrectly truncated.

There are no errors to indicate a problem. Scoring completes. However, if you examine the LOG from scoring, warnings such as the following are displayed:

WARNING: Length of character variable OPT_<variable_name> has already been set.
Use the LENGTH statement as the very first statement in the DATA STEP to 
declare the length of a character variable.

To work around the problem, manually edit the generated score code. Change the LENGTH value for OPT_<variable_name> variables such that each one is as long as the maximum LENGTH of all of them. Used the edited score code to re-score the data.

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