Missing Method in Method Directive Maintenance

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I am trying to fire a BPM post-processing for PkgControlIDBuildSplitMerge.AddPartToPCID method. I am on 10.2.300.40 and I don’t see that as an acceptable option in Method Directive Maintenance. Am I missing something? Is there a way to achieve this another way? For now, I’m cheating with a form customization that sets the fields when the button is clicked. But I am not satisfied with that.

Thanks in advance!