Number of elements listed must match the number of new custom property names. Specify ''table'' or ''variable'' for each new custom property. Custom property names must be a character vector, string array, or cell array of character vectors. For each custom property, specify ''variable'' or ''table'' to indicate whether the property applies to the variables, or to the table as a whole. Specify these settings in a string array or cell array of character vectors. Duplicate custom property name: ''{0}'' New custom property name ''{0}'' conflicts with existing ''{1}'' custom property ''{0}''. Using {0} without assigning to a workspace variable does not modify the table's custom properties. Use t = {0}(t{1}). ''{0}'' is not a valid custom property name.