vtiger在C：\ xampp \ htdocs \ vtigercrm \ include \ database \ PearDatabase中调用成员函数Exec​​ute（）on null

Question

I am installing vtiger,

when i open the index page,

i got this error:

Fatal error: Call to a member function Execute() on null in C:\xampp\htdocs\vtigercrm\include\database\PearDatabase.php on line 357

i opened the PearDatabase.php file, and I found this:

if($this->avoidPreparedSql || empty($params)) {
            $sql = $this->convert2Sql($sql, $params);
            $result = $this->database->Execute($sql);
        } else {
            $result = $this->database->Execute($sql, $params);
        }

the line 357 is:

$result = $this->database->Execute($sql);

Answer 1

Make sure you have installed all the pre-requisites:

Pre-requisites from here:

• Apache 2.1+
• MySQL 5.1+ (default storage engine = InnoDB)
• PHP 5.2+, 5.3
  • php-imap
  • php-curl
  • php-xml
  • max_memory (min. 256MB)
  • max_execution_time (min. 60 seconds)
  • error_reporting (E_ALL & ~E_NOTICE & ~E_DEPRECATED)
• Hardware: 4 GB RAM, 250 GB Disk (for file attachments)

The error is suggesting that it can't work out what to do with the back end database.