In continuing to get to the root of this problem, I viewed the source of the “install_amp” file.
Line 13 is require_once (“libfreepbx.install.php”);
When I view the source for libfreepbx.install.php I see:
102//get the version number
103 function install_getversion() {
104 global $db;
105 $sql = “SELECT value FROM admin WHERE variable = ‘version’”;
106 $results = $db->getAll($sql);
107 if(DB::IsError($results)) {
108 return false;
109 }
110 return $results[0][0];
111 }