Urgent problem --- Please help!

[sonnieboy]

//Markup

//*initialize file path to be used later.
$path_to_file = '../uploadsFolder/';

     <table border="0">
      <tr>
            <td class="td_input_form">
	 	         <?php
	 	         // if the SignInSheet is empty,
	 	         if(file_exists($path_to_file . $result["SignInSheet"]))
	 	         {
	 	             // Bid file already upload, show checkbox to delete it.
	 	             echo '<input type="file" name="SignInSheet[]" size="50"> <br />';
	 	             echo '<input type="checkbox" name="delete[]" value="'.$result["SignInSheet"].'"> (delete)
                     <a href="http://domain/AppFolder/AppFiles/uploadsFolder/'.$result["SignInSheet"].'" target="_blank" onclick="window.open (this.href, \'child\', \'height=800,width=850,scrollbars\'); return false" type="application/octet-stream">'.$result["SignInSheet"].'</a>';
	 	         }
	 	        else
	 	         {
	 	             //then show file upload field for SignInSheet
	 	             echo '<input type="file" name="SignInSheet[]" size="50">';
	 	         }
	         ?>
       </td>
       <td class="td_hint_form"></td>
      </tr>
     </table>

We have an app that has been stable and working for the past two and half years till yesterday when we started receiving the following error:

 

The specified URL cannot be found

 

This is an app that allows users to enter comments and upload a file that accompanies the comments.

 

When you enter comments and click the submit button without uploading a file. Then no problem; everything works.

 

If however, you upload a file along with the comments, you get the above error message.

What is most interesting is that when you select a file to upload and click the upload button, it is not reaching the processing.php page.

 

We set up and configured php with IIS.

 

I am sure that whatever the problem is has to do with browser or IIS.

 

I have spent all yesterday afternoon and the all day today but could not figure out what the problem could be.

 

Your urgent assistance is greatly appreciated.

I am posting this code snippet although I don't think code is causing the problem.

 

 

[benanamen]

No one is going to be able to solve your problem with the code YOU think we need to see. I won't even get into why you should not be using IIS as your server.

 

Also, what changed yesterday from the day before?

Edited November 16, 2016 by benanamen

[sonnieboy]

First, thanks for your response.

 

As stated, the only reason I even posted that code is because I am convinced code is not the issue.

 

I say this because when I add debugger to processing.php and click submit, it is not being reached.

 

I have had similar situation about 2 years ago when I started receiving directory not found error.

 

It turned out that I need to increase the size of file uploads in IIS and it solved the problem.

 

I am confident it is something similar except I don't know where to look.

 

I can dump all the thousands of code I have here but I don't think it is the code.

About switching away from IIS, I can begin to look into that but this is so urgent that my head is hurting the many calls and emails I have received so far from management which prompted me to ask for  help.

Edited November 16, 2016 by sonnieboy

[Jacques1]

Have you checked the error log of your webserver? Have you tried an empty or extremely small file? Have you checked the network traffic in your browser?

[sonnieboy]

I have checked the error log and it is not showing me anything.

 

This issue has exactly the same attributes as the Directory Not Found error I alluded to.

So, because when I click the Submit button and it is not reaching the processing.php page, it is not possible to find anything on the server.

 

I have tried a file as small as 25kb and the error occurs.

 

I would add that as at 1:15PM tomorrow, they have been able to upload files.

 

Also, I have set the file limit to up to 2GB and in the past, they have been to upload to 200MB.

I cannot empty the folder because of the traffic on the site.

 

I can probably do that tonight around 11PM when the traffic is very limited of any and see what happens.

 

My gut tells me there is some additional IIS configuration I have to do to resolve this.

 

I just don't know what to look for.

[sonnieboy]

http://domain/AppFolder/AppFiles/uploadsFolder/

I also wanted to add that if I just enter the url where the uploadsFolders resides on the server, I get same error that I posted.

 

I don't know if it is irrelevant or not.

[sonnieboy]

Actually, I withdraw that last statement because if it were possible for people to do so, they would delete or infect all the files.

Sorry about that last post. It is a bit silly.