06-13-2016 01:20 PM
I'm going to guess that the issue is when you remove observations that have a missing target, one (or more) of the inputs is unary. To check this, from the Variables editor for the HP SVM node, you can select all the variables then click on the Explore... button, then in the histogram for the target click on the bar for the missing values, then it should be apparent from the histograms for the inputs which one is input. You can then set Use=No for that variable in the Variables editor. Hope that helps!