Adding search.Filter with a formula in it to a search.create

I cant seem to figure out why my search.created will not accept my filter. It errors saying its not an array. Yet when I look at it on the debugger the fields are exactly right. I've tried creating the filter in the set of arrays, passing the filter as a variable multiple ways. Has anyone figured this out? Here is my code as an example.

        var closingMonthSearch = search.create({              type: record.Type.SALES_ORDER,              columns:     ['department',                            'type',                            'datecreated',                            'item',                            'tranid',                            'entity',                            'quantity',                            'shiprecvstatusline',                            'quantitybilled',                            'quantityshiprecv',                            'effectiverate',                            'rate',                            'isclosed',                            'line',                            search.createColumn({                                                                                         name: 'formulanumeric',                                 type: 'float',                                 formula: '{quantity}-{quantityshiprecv}',                                 sortdir: 'ASC'                            }),                            search.createColumn({                                                                                         name: 'formulanumeric',                                 type: 'float',                                 formula: '({quantity}-{quantityshiprecv})*{effectiverate}',                                 sortdir: 'ASC'                            }),                            search.createColumn({                                                                                         name: 'formulanumeric',                                 type: 'float',                                 formula: 'case when {effectiverate} = 0 then ({quantity}-{quantityshiprecv})*{rate} else 0 end',                                 sortdir: 'ASC'                            }),                            'custbody16'],              filters: [                  ['type', 'anyof', 'SalesOrd'],                  'and',                  ['account', 'anyof', '54'],                  'and',                  ['datecreated', 'after', 'monthsago20'],                  'and',                  ['closed', 'is', 'F'],                  'and',                  search.createFilter({                                              //THIS IS THE LINE THAT IM HAVING PROBLEMS                      name: 'formulanumeric',                      operator: 'greaterthan',                      values: '0',                      formula: '{quantity}-{quantityshiprecv}'                  })                  ]          });