The specified URL cannot be found. Workaround

The specified URL cannot be found.
PHP page test.php is an upload page can be opened directly but accept upload to prompt the specified URL cannot be found. There is absolutely no error in the code!
Require_once dirname (__file__). ' /config.php ';
Require_once ROOT. ' checklogin.php '; Check login status
if (isset ($_files[' file ')) {
Echo 5;exit;
}else{
Require_once ROOT. ' Templates/upload.htm ';
}
.
Server deployment is server A and B load balanced while test.php did the Linux soft link to another physical machine on the hard drive why can open test.php but not post it?.. Server webserver with Nginx do not know where the problem is tangled ...

------Solution--------------------
Turn on the error display feature. Contains the path is correct.
------Solution--------------------
The specified URL cannot be found
Is the PHP feedback back to the message that this to execute the PHP page is not found. Check the path, you can also check the PHP log/www.access.log and nginx access logs.

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