The Interactive Grouping node in SAS^® Enterprise Miner™ enables you to interactively form groups of values. However, observations might be incorrectly assigned to the _MISSING_ group. The problem occurs if you follow this sequence of steps.

1. In the Groupings tab of the Interactive Grouping window, select all non-missing values for a variable, right-click, and select Merge Bin.
2. Click Close and Yes to save changes.
3. Attach and run a subsequent node, such as a Scorecard node.
4. After the subsequent node runs, go to the Interactive Grouping node, change the Use Frozen Groupings property from No to Yes.
5. Perform any action that causes the Interactive Grouping node to re-run. Example: change a property.

When the Interactive Grouping node re-runs, all observations for the variable are incorrectly re-assigned to the _MISSING_ group.

There is no workaround.

There are no errors or warnings. However, symptoms such as the following might occur:

• "<variable name> < ." is displayed in the Value column in the Interactive Grouping window, even though it is not possible for values to be less than "missing"
• there is no way to split the group that was formed during the re-assignment to the _MISSING_ group
• variables that should be on the scorecard are missing

To avoid the problem, do not select Merge Bin in the first step above. Instead, select Group= or New Group to specify your grouping choice.

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