[phpOpenTracker-User] GraphViz and API calls all_path

Hello,

I try to use all_path 's example script :
<?php$graph = phpOpenTracker::get(  array(    'api_call'      => 'all_paths',    'result_format' => 'graphviz_object'  ));$graph->image('png');?>But it doesn't work, i've this :<br />
<b>Warning</b>:  stat failed for C:\WINDOWS\TEMP\gra42D1.TMP.png (errno=2 - No such file or directory) in <b>c:\program files\easyphp\www\tracker\Image\GraphViz.php</b> on line <b>123</b><br />
<br />
<b>Warning</b>:  Cannot add header information - headers already sent by (output started at c:\program files\easyphp\www\tracker\Image\GraphViz.php:123) in <b>c:\program files\easyphp\www\tracker\Image\GraphViz.php</b> on line <b>123</b><br />
<br />
<b>Warning</b>:  fopen("C:\WINDOWS\TEMP\gra42D1.TMP.png", "rb") - No such file or directory in <b>c:\program files\easyphp\www\tracker\Image\GraphViz.php</b> on line <b>125</b><br />
I use win98+easyphp. Could you help me please ?Thanks.JP.