MDB2 Error: Array

Dear Pear support, Hello! I tried this code: <?php

    require_once("MDB2.php");

    $linkm =& MDB2::connect("mysqli://".$db_username.":".$db_password."@".$db_host."/".$db_schema."");

    if(MDB2::isError($linkm)){

printf("Connect failed: %s\n", $linkm->getMessage()); die("Connection Failed\n");

    }

for($i=0; $i<100; $i++){ $sql = "call list_city()"; $result =& $linkm->query($sql); if(MDB2::isError($result)){ die($result->getMessage()); } while($row =& $result->fetchRow()){ } $result->free(); $sql = "call list_country()"; $result =& $linkm->query($sql); if(MDB2::isError($result)){ die($result->getMessage()); } while($row =& $result->fetchRow()){ } $result->free(); $sql = "call list_state()"; $result =& $linkm->query($sql); if(MDB2::isError($result)){ die($result->getMessage()); } while($row =& $result->fetchRow()){ } $result->free(); $sql = "call list_name()"; $result =& $linkm->query($sql); if(MDB2::isError($result)){ die($result->getMessage()); } while($row =& $result->fetchRow()){ } $result->free(); $sql = "call list_postcode()"; $result =& $linkm->query($sql); if(MDB2::isError($result)){ die($result->getMessage()); } while($row =& $result->fetchRow()){ } $result->free(); $sql = "call list_tel()"; $result =& $linkm->query($sql); if(MDB2::isError($result)){ die($result->getMessage()); } while($row =& $result->fetchRow()){ } $result->free(); $sql = "call list_mobile()"; $result =& $linkm->query($sql); if(MDB2::isError($result)){ die($result->getMessage()); } while($row =& $result->fetchRow()){ } $result->free();

       }
       print "finish<br>";

?> Sometime it print out the "finish", sometime it print out the error message "MDB2 Error: Array". I really don't know why? Is the peal have a problem? It is just a simple "list" procedure! If use pear to run more procedures, error will happen more! I am looking forward to your help! Thanks! Best regards, Vincent