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[How-To] Quick Troubleshooting
HMBeaty
Join Date: Sep 2005
Posts: 4,141

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Morristown, TN
by HMBeaty HMBeaty is offline 14 Oct 2011

As you upgrade / modify vBulletin, you may come across several different errors such as:
  • Blank / white page(s)
  • PHP errors
  • Database errors
And several more, but those that I've listed above seem to be the most common

Blank / White Page(s)

If you are receiving a blank / white page on your vBulletin installation, go through each of the steps listed here as that will fix your issue 99% of the time.

PHP Errors

If you are receiving a php error, which should usually look something like this:

Block Disabled:      (Update License Status)  
Suspended or Unlicensed Members Cannot View Code.

Then you should be able to easily translate it using the information below...

somefile.php(251) => line 251 of somefile.php
eval()'d code (line 125) => there is an error in line 125 of a plugin or a template

Now, to start tracking the error down, go to line 251 of somefile.php. There will probably be a fetch_hook() or fetch_template() call in this line. This identifier tells you the hook or template name that is causing the error.

If it's a hook, there may be multiple plugins attached to it so you'll have to find out which one is causing the problem by disabling all of the plugins using this hook and then re-enabling them one by one until the error appears again. Now you have the exact line for the plugin code that's causing the error.

If it's a template, open it and go directly to the line indicated by the error. Most likely you'll find an invalid template conditional there.

Database Errors

You NEED to know the exact error! Again, you NEED to know the exact error!!

To view the exact error you are receiving:
  • Edit your includes/config.php file and add your email to
    Block Disabled:      (Update License Status)  
    Suspended or Unlicensed Members Cannot View Code.

  • Go to your AdminCP => Settings => Options => Error Handling & Logging and set a path for Log Database Errors to a File. Something like this:
    Block Disabled:      (Update License Status)  
    Suspended or Unlicensed Members Cannot View Code.

    (Make sure to restrict access to this directory using .htaccess and CHMOD to 777)
  • If you still can't view it via the above options, go to the page where you are getting the database error, and right click => View Source and you should see your database error somewhere around the middle of the page.
As an example, it could look something like this:

Block Disabled:      (Update License Status)  
Suspended or Unlicensed Members Cannot View Code.

Now, almost 100% of the time, you can find out how to fix the error, or what is causing the error, by searching for MySQL Error : MySQL server has gone away in Google (omg, don't hurt yourself trying to actually use the search feature )

In this case MySQL Error : MySQL server has gone away is an issue with your host, and you would need to contact them about it. Make sure to include the error(s) you're receiving when contacting them

######################################

To see what's causing your problems a little faster than using the above options, a majority of the time, you can narrow it down by disabling your modifications and / or testing your problem on a completely default vBulletin style.

To disable your plugins, you will need to edit your includes/config.php file and add this line right below <?php

Block Disabled:      (Update License Status)  
Suspended or Unlicensed Members Cannot View Code.

To create a completely default vBulletin style, just create a new style with no parent. Voila!
  • Styles & Templates > Style Manager > Add New Style
  • Parent Style: No Parent Style
  • Title: Default vBulletin
  • Allow User Selection: Yes
  • Save
Bookmark this page as I guarantee you will probably need it at some point

Last edited by HMBeaty; 14 Oct 2011 at 06:01..
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  #2  
Old 14 Oct 2011, 12:37
doctorsexy's Avatar
doctorsexy doctorsexy is offline
 
Join Date: Apr 2011
Real name: Chris
Thanks..just what i was looking for....
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  #3  
Old 08 Nov 2011, 08:03
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abdobasha2004 abdobasha2004 is offline
 
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great coding....
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  #4  
Old 24 Mar 2013, 17:33
matrex722's Avatar
matrex722 matrex722 is offline
 
Join Date: Jan 2007
its very easy way to know Errors
but the hard thing is how to fix
thanks for your explanation
i think it will help many
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  #5  
Old 22 Aug 2013, 22:39
vBarsiv vBarsiv is offline
 
Join Date: Jul 2010
Excuseme. I need help for themes error. I was upgrade vbulletin 3.8.2 to 4.2.0 patch level 3 but i have errors down. Why?


Block Disabled:      (Update License Status)  
Suspended or Unlicensed Members Cannot View Code.

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