So I've got a custom sublist (not through script) that I'm trying to add a column to. I'm able to do this fine with various other native sublists (inventory numbers, for example), but when trying to add it to customsublist29, I get an error that the field must be prefixed with custpage_ (which I'm doing). Is it not possible to add columns to custom sublists? This one is being displayed through the Customization > Forms > Sublists config. WORKS

var form = scriptContext.form;
var invSublist = form.getSublist({
	id: 'numbers'    				
});
invSublist.addField({
	id : 'custpage_test',
	type : 'text',
	label : '***TEST COLUMN***'
});

recognize the different types of sublists

@battk That's what I figured. I might as well script this out then, since it's based on a search anyways. Thanks!