How to solve ERROR: Maximum levels of 512 exceeded ?

[cody_q]

Dear all ,

I have tried using the (2) suggested methods of changing variable from nominal to interval and also to add   %let EM_TRAIN_MAXLEVELS=n; to project start code.

My dataset doesnt allow me to choose interval and i have placed the code in the Code utility .

Currently, the flow is SAS Code -> Dataset -> Decision tree

In my dataset i have user_id , item_id , results cols .

results is 1 for followed , -1 for not following

I wanna based the decision tree on 2 leave nodes ( followed ) or (not followed)

Thanks
YL

[kingsley]

This error does not necessarily mean that there is a problem. If you encounter this error and do not suspect a problem with your data, then you can eliminate this message in two ways.

• Change the level of the variable from Nominal to Interval in the data source.
•   Add the following line of code in the Project Start Code: 

  %let EM_TRAIN_MAXLEVELS=n;

  N equals the maximum number of levels that you want to allow.

Use whichever method you judge to be statistically appropriate for your analysis.

http://support.sas.com/kb/20/054.html