Submitting code and getting inconsistent results

I am trying to query records and getting inconsistent results.  Sometimes it will return a positve answer and other times it will not.  In the usage log it shows as going through and returning no results and then you run it again and it will return the result.


$service = new NetSuiteService();
$service->setSearchPreferences(false, 20);


$contactSearch = new ContactSearch();
$contactSearchBasic = new ContactSearchBasic();//SearchRecordBasic
$contactSearchBasic->email = new SearchColumnStringField();
$contactSearchBasic->email->searchValue = 'XXX@XXX.com';
$contactSearchBasic->email->operator = SearchStringFieldOperator::is;
$contactSearch->basic = $contactSearchBasic;

$searchRequest = new searchRequest(); //% contains a searchRecord
$searchRequest->searchRecord = $contactSearch;

$searchResponse = $service->search($searchRequest);