https://communities.sas.com/t5/SAS-Data-Science/Error-Max-target-levels-of-512-exceeded/m-p/607180#M8065 Are you sure your nominal attribute has 513 levels? If it did, 550 levels would have been enough. <BR />Verify the number of levels within then nominal variable. You can use the following code or a proc freq to do that. <BR /><BR />proc sql;<BR />select count(distinct varName) as N_Distinct<BR />from tableName;<BR />quit; Tue, 26 Nov 2019 03:01:04 GMT Reeza 2019-11-26T03:01:04Z https://communities.sas.com/t5/SAS-Data-Science/Error-Max-target-levels-of-512-exceeded/m-p/607174#M8064 <P>I am using Enterprise Miner to train a Logistic Regression Model. In my dataset, there is a nominal attribute which has 513 classes. So, the training was not performed since it exceeded 512. Then, I followed the instruction to change the EM_TRAIN_MAXLEVELS to 550, I also added "%let EM_TRAIN_MAXLEVELS = 550" in Project Start Code. I used a new Regression node to run the flow, but it still didn't work. This time the error is "<STRONG>Error:</STRONG> Maximum target levels of 550 exceeded."&nbsp;</P><P>&nbsp;</P><P>What am I supposed to do?&nbsp;</P> Tue, 26 Nov 2019 02:29:55 GMT https://communities.sas.com/t5/SAS-Data-Science/Error-Max-target-levels-of-512-exceeded/m-p/607174#M8064 MLAC 2019-11-26T02:29:55Z https://communities.sas.com/t5/SAS-Data-Science/Error-Max-target-levels-of-512-exceeded/m-p/607180#M8065 Are you sure your nominal attribute has 513 levels? If it did, 550 levels would have been enough. <BR />Verify the number of levels within then nominal variable. You can use the following code or a proc freq to do that. <BR /><BR />proc sql;<BR />select count(distinct varName) as N_Distinct<BR />from tableName;<BR />quit; Tue, 26 Nov 2019 03:01:04 GMT https://communities.sas.com/t5/SAS-Data-Science/Error-Max-target-levels-of-512-exceeded/m-p/607180#M8065 Reeza 2019-11-26T03:01:04Z